CN202569789U - Double-layer pre-filled filter material type filter pipe - Google Patents
Double-layer pre-filled filter material type filter pipe Download PDFInfo
- Publication number
- CN202569789U CN202569789U CN 201220129019 CN201220129019U CN202569789U CN 202569789 U CN202569789 U CN 202569789U CN 201220129019 CN201220129019 CN 201220129019 CN 201220129019 U CN201220129019 U CN 201220129019U CN 202569789 U CN202569789 U CN 202569789U
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- screen pipe
- filter
- filter pipe
- pipe
- filter material
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Abstract
The utility model relates to a double-layer pre-filled filter material type filter pipe. An inner filter pipe consists of a perforated filter pipe and a filter screen wound outside the perforated filter pipe, an outer filter pipe is a bridge type filter pipe, a filter material is filtered between the inner and outer filter pipes, the inner wall of the perforated filter pipe is in threaded connection with the outer walls of the thin ends of reducing joints, and the bridge type filter pipe is embedded into clamping grooves at the thick ends of the reducing joints. According to the double-layer pre-filled filter material type filter pipe, the two filter pipes with small calibers and different types are nested together, the filter material is filled in clearance between the two pipes before the double-layer filter pipe enters a pumping well, two ends of the two filter pipes are fixed by using the reducing joints to form a whole set of light filter pipe, and fine sand grains in strata can be effectively filtered, so that implementation procedures are reduced, seepage stability of the strata to be pumped is ensured, and the sand content of the pumped water is reduced; and the double-layer filter pipe is applied to pumping test for the fine sand strata by means of small-caliber drilling in exploration of geotechnical engineering.
Description
Technical field
The utility model relates to a kind of filter material screen pipe of small-bore bailing test, is applicable to the small-bore bailing test on powder fine sand stratum.
Background technology
At present, municipal subway, large-scale stride rivers sea-bridge beam and tunnel construction in the ascendant, utilize on-the-spot bailing test to find out that stratum permeability is significant to designing and constructing.Tradition geotechnical engineering investigation bailing test pumped well diameter needs 500～600mm, and pore-forming equipment is bulky, and noise is big.Yet the business district of building dense is passed through in municipal subway line position more, strides rivers sea-bridge tunnel and receives limiting factors such as the depth of water, navigation channel maritime affairs many, and these two types of engineering investigation scenes do not possess the implementation condition of traditional bailing test.Domestic surveying unit is many through existing worker is surveyed the boring reaming to 150mm for these two types of engineerings; Insert the follow-up of ф 146mm sleeve pipe to the water-bearing layer; After insert ф 127mm well casing, screen pipe again, carry out small-bore bailing test after filling out filter material in the space between well casing and the hole wall.Because well casing and hole wall gap are little; Be prone to make filter material to sink to producing soil arching effect, cause filter material can not sink down into the screen pipe periphery smoothly, thereby can not play reverse filter effect powder fine sand stratum; The sand factor of extracting water out makes small-bore bailing test failure greater than code requirement.
Summary of the invention
The purpose of the utility model is to above-mentioned present situation; Aim to provide and a kind ofly make small-bore bailing test be successfully applied to powder fine sand stratum; Reduce and implement operation; Guarantee that filter material can be evenly distributed on the well casing periphery, and effectively reduce the sand factor of extracting water out, the bilayer that makes small-bore bailing test can be able to extensive use is filled out filter material formula screen pipe in advance.
The implementation of the utility model technical scheme is: bilayer is filled out filter material formula screen pipe in advance; The internal layer screen pipe is made up of the outer filter screen that twines of perforate screen pipe and its; The outer filter pipe is the bridge-type screen pipe; Fill filter material between the inside and outside layer screen pipe, perforate screen pipe inwall is connected with the thin end outer wall thread of reducer union, and bridge-type screen pipe down is gone in the draw-in groove of reducer union butt end.
The utility model nests together through the screen pipe that bore is less, pattern is different with two; Before inserting pumped well, in two ligaments, fill filter material, utilize reducer union with fixing a whole set of the light screen pipe that forms in two ends again; Can carry out effectively anti-filter to powder fine sand particle in the stratum; Reduced the execute-in-place operation, guaranteed that filtrate evenly distributes between two pipe, make reverse filter effect be effectively played.Be applicable to the bailing test of utilizing small diameter hole that powder fine sand stratum is carried out in the geotechnical engineering investigation.
Description of drawings
Fig. 1 is the utility model structural representation,
Fig. 2 is the reducer union structural representation,
Fig. 3 is the outer silk of a ф 127mm connector structural representation,
Fig. 4 is a bailing test well casing structural representation,
Fig. 5 is small-bore bailing test device structure sketch map.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
With reference to Fig. 1,2; The internal layer screen pipe of the utility model is made up of the outer filter screen 3 that twines of perforate screen pipe 1 and its; The outer filter pipe is a bridge-type screen pipe 2; Fill filter material 4 between the inside and outside layer screen pipe, perforate screen pipe 1 inwall is connected with the thin end outer wall thread of reducer union, and bridge-type screen pipe 2 down are gone in the draw-in groove of reducer union 5 butt ends.
Bridge-type screen pipe 2 internal diameter 127mm, filament diameter 73mm in the perforate screen pipe 1.The width of the thick head draw-in groove of opening 10 of reducer union 5 is the wall thickness of bridge-type screen pipe 2.Bridge-type screen pipe 2 down go into to form an integral body in the draw-in groove of reducer union 5 butt ends, to improve integral rigidity.
The perforate screen pipe 1 outer filter screen that is twined 3 is steel 40 mesh filter screens.
Before using the utility model, outside perforate screen pipe 1, twine steel 40 mesh filter screens earlier, form the internal layer screen pipe.Perforate screen pipe 1 is inserted in the ф 127mm bridge-type screen pipe 2, perforate screen pipe 1 inwall is connected with the thin end outer wall thread of reducer union, ф 127mm bridge-type screen pipe 2 one end down are gone in the draw-in groove of reducer union 5 butt ends.Then erect, slowly drop into filter material 4 between the inside and outside layer screen pipe, available high pressure water impact is filled closely knit.The filter material 4 of filling between the inside and outside layer screen pipe is the homogeneous coarse sand.Perforate screen pipe 1 other end inwall is connected with the thin end outer wall thread of reducer union, ф 127mm bridge-type screen pipe 2 other end down are gone in the draw-in groove of another reducer union 5 butt ends again.So far, accomplished the assembling of the utility model (Fig. 1).
The screen pipe longer like need can interconnect and can realize through the end of the outer silk of ф 127mm shown in Figure 3 connector 6 with the utility model of Fig. 1.
With reference to Fig. 4; During with the utility model assembly unit bailing test well casing; The two ends of the utility model are threaded with the outer silk of a ф 127mm connector 6, about the outer silk connector of the other end of two the outer silk of ф 127mm connectors 6 be threaded and can realize with ф 127mm sediment tube 8 and ф 127mm well casing 9 respectively.
With reference to Fig. 5, when adopting the utility model to draw water, after sediment tube 8, the utility model, well casing 9 put into the hole and put in place, following immersible pump carried out bailing test.ф 146mm sleeve pipe 11 intercepts perched water.Powder fine sand water-bearing layer underground water is in the utility model gets into 127 well casings 9; Adopt ф 91mm immersible pump 10 to draw water; The water of extracting out is noted pump-out through floodometer 12; Utilize universal meter needle water level gauge 13 to measure depth to water simultaneously, thereby realized small-bore bailing test powder fine sand water-bearing layer.
Claims (4)
1. bilayer is filled out filter material formula screen pipe in advance; It is characterized in that the internal layer screen pipe is made up of the outer filter screen that twines of perforate screen pipe and its; The outer filter pipe is the bridge-type screen pipe; Fill filter material between the inside and outside layer screen pipe, perforate screen pipe inwall is connected with the thin end outer wall thread of reducer union, and bridge-type screen pipe down is gone in the draw-in groove of reducer union butt end.
2. bilayer according to claim 1 is filled out filter material formula screen pipe in advance, it is characterized in that bridge-type screen pipe (2) internal diameter 127mm, the interior filament diameter 73mm of perforate screen pipe (1); The width of the thick head draw-in groove of opening of reducer union (5) is the wall thickness of bridge-type screen pipe (2).
3. bilayer according to claim 1 is filled out filter material formula screen pipe in advance, it is characterized in that the outer filter screen (3) that twines of perforate screen pipe (1) is steel 40 mesh filter screens.
4. bilayer according to claim 1 is filled out filter material formula screen pipe in advance, it is characterized in that the filter material (4) of filling between the inside and outside layer screen pipe is the homogeneous coarse sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220129019 CN202569789U (en) | 2012-03-30 | 2012-03-30 | Double-layer pre-filled filter material type filter pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220129019 CN202569789U (en) | 2012-03-30 | 2012-03-30 | Double-layer pre-filled filter material type filter pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202569789U true CN202569789U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220129019 Expired - Lifetime CN202569789U (en) | 2012-03-30 | 2012-03-30 | Double-layer pre-filled filter material type filter pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202569789U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046528A (en) * | 2013-01-04 | 2013-04-17 | 天津大学 | Vertical well pipe for assisting in efficiently extracting groundwater in low permeable aqueous medium in laboratory and usage method of vertical well pipe |
| CN106215504A (en) * | 2016-08-30 | 2016-12-14 | 山东胜伟园林科技有限公司 | A kind of hollow double-layer filter material wave duct |
| CN109811827A (en) * | 2019-03-22 | 2019-05-28 | 新疆铁道勘察设计院有限公司 | A kind of Double-layer water well casing with filter structure |
-
2012
- 2012-03-30 CN CN 201220129019 patent/CN202569789U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046528A (en) * | 2013-01-04 | 2013-04-17 | 天津大学 | Vertical well pipe for assisting in efficiently extracting groundwater in low permeable aqueous medium in laboratory and usage method of vertical well pipe |
| CN106215504A (en) * | 2016-08-30 | 2016-12-14 | 山东胜伟园林科技有限公司 | A kind of hollow double-layer filter material wave duct |
| CN106215504B (en) * | 2016-08-30 | 2018-05-01 | 山东胜伟盐碱地科技有限公司 | A kind of hollow double-layer filter material wave duct |
| CN109811827A (en) * | 2019-03-22 | 2019-05-28 | 新疆铁道勘察设计院有限公司 | A kind of Double-layer water well casing with filter structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
|
| CX01 | Expiry of patent term |