CN202706937U - Gas drainage drill pipe - Google Patents
Gas drainage drill pipe Download PDFInfo
- Publication number
- CN202706937U CN202706937U CN 201220381239 CN201220381239U CN202706937U CN 202706937 U CN202706937 U CN 202706937U CN 201220381239 CN201220381239 CN 201220381239 CN 201220381239 U CN201220381239 U CN 201220381239U CN 202706937 U CN202706937 U CN 202706937U
- Authority
- CN
- China
- Prior art keywords
- gas drainage
- drill pipe
- drainage drill
- joint
- reinforced pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a gas drainage drill pipe. A bolt joint, a nut joint and a rod body of a drill pipe are formed into an integrity structure machined by a steel tube. A reinforcement tube used for strengthening the intensity of the bolt joint is placed inside the bolt joint in sleeved mode. An outer end of the reinforcement tube is welded at an outer end of the bolt joint. The wall thickness of the inner end portion of the reinforcement tube is of gradually changed shape from an external diameter of the reinforcement tube to an internal diameter of the reinforcement tube along the direction of the nut joint to the bolt joint. According to the gas drainage drill pipe, the gas drainage drill pipe can be machined by using the steel tube with a thick tube wall, and the intensity of the bolt joint can be strengthened by the reinforcement tube. Not only is material cost saved, but also the carrying difficulty is reduced. The whole intensity of the gas drainage drill pipe is also effectively improved. At the same time, inserting of gas discharge pipes into the gas drainage drill pipe is not affected.
Description
Technical field
The utility model relates to a kind of gas drainage drill stem.
Background technology
In the recovery process of high fiery colliery, according to the principle of " take out afterwards first and adopt ", must carry out first gas drainage under suction, and all will use drilling rod in the gas drainage under suction process.Generally speaking, the prismatic drilling rod than round drill rod beat fast, beat directly, deslagging is good, as use light-wall pipe to be processed into the body of rod, and reprocess nut connector and bolt connector and the body of rod with regard to needs and weld, drilling rod in use ruptures in the welding position easily like this.As use special thick-walled pipe to process, and can avoid welding procedure, increase the intensity of the body of rod, but greatly increased material cost and carrying difficulty.As using slightly thick steel pipe to process, the intensity of its nut connector is just poor, how both to have saved cost, reduces the carrying difficulty, increases again lever strength, is a great problem of present gas drainage drill stem.
Summary of the invention
The purpose of this utility model provides and a kind ofly both can increase lever strength, effectively reduces bolt connector damage probability, can wear the gas drainage drill stem that adds the drawing-off gas pipe again.
For achieving the above object, the technical solution adopted in the utility model is: a kind of gas drainage drill stem, the screwed joint of drilling rod, nut connector and the body of rod integrative-structure for being processed by a steel pipe, suit one is used for the reinforced pipe of strengthening stud strength of joint in the described screwed joint, and the external diameter of reinforced pipe is identical with the internal diameter of screwed joint.
Above-mentioned gas drainage drill stem, the outer end of described reinforced pipe and the welding of the outer end of screwed joint, the wall thickness of the inner end of reinforced pipe is for to be by the grading profile of reinforced pipe external diameter to the reinforced pipe internal diameter to the screwed joint direction from nut connector.
Because adopt technique scheme, the beneficial effects of the utility model are:
The suit one external diameter reinforced pipe identical with the screwed joint internal diameter can use the thicker steel pipe of tube wall to be processed into gas drainage drill stem in the screwed joint, comes the strengthening stud strength of joint with reinforced pipe.Needn't adopt the special thick steel pipe of tube wall, not only save material cost, reduce the carrying difficulty, and effectively increased the bulk strength of gas drainage drill stem.The wall thickness of the inner end of employing reinforced pipe is for to be by the grading profile of reinforced pipe external diameter to the reinforced pipe internal diameter to the screwed joint direction from nut connector.Can be after gas extraction hole breaks into, in gas drainage drill stem, insert the drawing-off gas pipe, extract gas drainage drill stem and drill body after.Pre-buried stack is just stayed in the gas extraction hole, no matter the coal seam has or not slump, does not affect the discharging of gas in the coal seam.
Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description.And to a certain extent, based on to investigating hereinafter, will be apparent to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction.Target of the present utility model and other advantages can be passed through following manual, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Description of drawings
Fig. 1 is the utility model master cross-sectional schematic
Fig. 2 is the A-A cross-sectional schematic among Fig. 1
Mark among the figure: 1-screwed joint 2-reinforced pipe 3-inner end 4-body of rod 5-center vent 6-nut connector
The specific embodiment
As shown in Figure 1 and Figure 2, a kind of gas drainage drill stem, the screwed joint 1 of drilling rod, nut connector 6 and the integrative-structure of the body of rod 4 for being processed by a steel pipe, described screwed joint 1 interior suit one is used for the reinforced pipe 2 of strengthening stud joint 1 intensity, and the external diameter of reinforced pipe 2 is identical with the internal diameter of screwed joint 1.
The outer end welding of the outer end of described reinforced pipe 2 and screwed joint 1, the wall thickness of the inner end 3 of reinforced pipe 2 is for to be by the grading profile of reinforced pipe external diameter to the reinforced pipe internal diameter to screwed joint 1 direction from nut connector 6.
During use, identical with the using method of other gas drainage drill stem.After the gas hole breaks into, if need in gas drainage drill stem, insert the drawing-off gas pipe, the drawing-off gas pipe inserted in the center vent 5 of gas drainage drill stem get final product.Because the inner end 3 of reinforced pipe 2 is by the grading profile of reinforced pipe external diameter to the reinforced pipe internal diameter.Reinforced pipe 2 can not stop the insertion of drawing-off gas pipe.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, other modifications that those of ordinary skills make the technical solution of the utility model or be equal to replacement, only otherwise break away from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of the claim scope of the present utility model.
Claims (2)
1. gas drainage drill stem, the screwed joint of drilling rod (1), nut connector (6) and the body of rod (4) integrative-structure for being processed by a steel pipe, it is characterized in that: suit one is used for the reinforced pipe (2) of strengthening stud joint (1) intensity in the described screwed joint (1), and the external diameter of reinforced pipe (2) is identical with the internal diameter of screwed joint (1).
2. according to gas drainage drill stem claimed in claim 1, it is characterized in that: the outer end welding of the outer end of described reinforced pipe (2) and screwed joint (1), the wall thickness of the inner end (3) of reinforced pipe (2) is for to be by the grading profile of reinforced pipe external diameter to the reinforced pipe internal diameter to screwed joint (1) direction from nut connector (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220381239 CN202706937U (en) | 2012-07-26 | 2012-07-26 | Gas drainage drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220381239 CN202706937U (en) | 2012-07-26 | 2012-07-26 | Gas drainage drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202706937U true CN202706937U (en) | 2013-01-30 |
Family
ID=47587246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220381239 Expired - Fee Related CN202706937U (en) | 2012-07-26 | 2012-07-26 | Gas drainage drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202706937U (en) |
-
2012
- 2012-07-26 CN CN 201220381239 patent/CN202706937U/en not_active Expired - Fee Related
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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: 20130130 Termination date: 20180726 |