CN211472544U - Dewatering well structure - Google Patents
Dewatering well structure Download PDFInfo
- Publication number
- CN211472544U CN211472544U CN201922291739.3U CN201922291739U CN211472544U CN 211472544 U CN211472544 U CN 211472544U CN 201922291739 U CN201922291739 U CN 201922291739U CN 211472544 U CN211472544 U CN 211472544U
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- Prior art keywords
- pipe
- sand control
- well casing
- wall
- precipitation
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- Expired - Fee Related
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- 239000004576 sand Substances 0.000 claims abstract description 115
- 238000001556 precipitation Methods 0.000 claims abstract description 82
- 238000001914 filtration Methods 0.000 claims abstract description 71
- 239000011148 porous material Substances 0.000 claims abstract description 49
- 239000004744 fabric Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
- 239000004746 geotextile Substances 0.000 abstract description 3
- 239000003673 groundwater Substances 0.000 description 11
- 230000002265 prevention Effects 0.000 description 8
- 239000012535 impurity Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- -1 and simultaneously Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model relates to a dewatering well structure, which comprises a dewatering well pipe inserted on the ground, a first filter layer and a first filter layer formed outside the first filter layer, wherein a submersible pump and a drain pipe are arranged in the dewatering well pipe, the upper opening of the dewatering well pipe is covered and fixed with a well cover, the drain pipe penetrates out of the well cover, a second filter layer and a first filter layer are formed by covering the first filter layer with geotextile, the lower extreme of drainage layer one and filter layer two extends to the lower opening department of precipitation well casing and with the lower opening shutoff of precipitation well casing, the lower opening department fixedly connected with sand control spare one of precipitation well casing, encircle the precipitation well casing and seted up a plurality of filtration pores, a plurality of filtration pores divide into two sets ofly and two sets of filtration pores equipartition respectively in the middle part and the lower part of precipitation well casing, the filtration pore that distributes in precipitation well casing middle part is less than the filtration pore of precipitation well casing lower part, be provided with in the filtration pore and be used for doing filterable sand control spare two to the filtration. The utility model discloses can effectual reduction precipitation well water-logging sand content during the use.
Description
Technical Field
The utility model belongs to the technical field of the technique of drainage construction and specifically relates to a precipitation well structure is related to.
Background
In the existing building construction technology, precipitation well engineering is a method for reducing the groundwater level for excavation of foundation pits, so that construction is convenient. However, when the existing dewatering well is applied and the traditional dewatering well is excavated in the soil direction of a foundation pit, the exposed well pipe body is easy to deform and even destroy, so that the well pipe body cannot be normally used in the later period and the excavation dewatering effect of the lower part of the foundation pit is influenced.
In order to solve the problems, the Chinese patent with the publication number of CN209686429U discloses a reusable all-steel sleeve precipitation well structure, which has the technical key points that: the filter comprises a precipitation well and a precipitation well pipe arranged inside the precipitation well, wherein filter layers are filled in the space between the side wall of the precipitation well and the outer wall of the precipitation well pipe and the space between the bottom of the precipitation well and the bottom of the precipitation well pipe, the precipitation well pipe is a steel cylinder pipe formed by welding a plurality of sections of all-steel sleeves, a plurality of sections of filter sections are distributed on the precipitation well pipe, a plurality of filter holes are formed in each filter section, and a water filtering gauze is wound on the outer wall of each filter section.
The above prior art solutions have the following drawbacks: above-mentioned technical scheme is when using, and this precipitation well casing is steel cylinder pipe, and precipitation well casing separates through the filter layer that drainage gauze and adoption grit formed only with the position of secret water seepage layer etc. for when using, underground grit easily leads to and filters the eye and enter into the precipitation well and discharge, can make losses such as sand and soil of foundation ditch lower part, can subside to cause certain influence to the underground, thereby causes the influence to the stability of construction and later stage ground.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects existing in the prior art, the utility model aims at providing a dewatering well structure.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the sand control well casing comprises a precipitation well casing, a first filter layer and a first filter layer, wherein the first filter layer is inserted into the ground, the first filter layer is coated on the outer wall of the precipitation well casing by nylon cloth, the first filter layer is filled with gravel and formed on the outer side of the first filter layer, a submersible pump and a drain pipe are arranged in the precipitation well casing and used for discharging water, the upper opening of the precipitation well casing is covered and fixed with a well cover, the drain pipe penetrates out of the well cover, the first filter layer is coated with geotextile and formed with a second filter layer, the lower ends of the first filter layer, the first filter layer and the second filter layer extend to the lower opening of the precipitation well casing and plug the lower opening of the precipitation well casing, the lower opening of the precipitation well casing is fixedly connected with a first sand control part used for plugging gravel, a plurality of filter holes are formed around the precipitation well casing, the plurality of filter holes are divided into two groups and are respectively and uniformly distributed on the middle part, and a second sand control part for filtering the filtering holes is arranged in the filtering holes.
Through adopting above-mentioned technical scheme, drainage bed one can be to the precipitation well casing support and simultaneously do preliminary filtration to the water of infiltration, filter layer one can be to preliminary sand control processing to the filtration pore, in order to reduce the probability that the grit in the drainage bed one enters into the precipitation well casing through the filtration pore, simultaneously a plurality of filtration pores divide into two sets ofly and two sets of filtration pores equipartition respectively in the middle part and the lower part of precipitation well casing, the filtration pore that distributes in precipitation well casing middle part is less than the filtration pore of precipitation well casing lower part, can make and emit groundwater to the intraductal while of precipitation well casing can effectual reduction well casing processing's complexity, in order to optimize the result of use, and sand control spare one and sand control spare two can do further sand control processing to the under shed and the filtration pore of precipitation well casing respectively, with the sand content of the intraductal water of further reduction well casing.
The present invention may be further configured in a preferred embodiment as: the filter hole includes filter hole one and the filter hole two with the same the central axis of filter hole, filter hole one is located filter hole two and keeps away from precipitation well casing central axis one side, filter hole one inclines downwardly extending from the outer wall of precipitation well casing towards its central axis, the axial cross-section of filter hole two is frustum form and its major diameter end towards precipitation well casing central axis one side, sand control spare two sets up in filter hole one.
Through adopting above-mentioned technical scheme, because the groundwater contains certain impurity, cause the siltation easily in the filtration pore, filtration pore one from the outer wall of precipitation well casing downwards extension towards its central axis slope, the axial cross-section of filtration pore two is frustum form and its major diameter end makes impurity in the groundwater move towards precipitation well casing central axis one side relatively comparatively more easily under the effect of gravity and rivers in order to reduce the probability that the filtration pore is blocked.
The present invention may be further configured in a preferred embodiment as: the sand control member two includes that fixed connection sets up in the sand control cloth two of sand control pipe two in the sand control pipe two of filter hole one inner wall with two, sand control cloth two is on a parallel with the radial of sand control pipe two, encircles the outer wall fixedly connected with ring platform one of sand control pipe two, ring platform one inlays and locates in the pore wall of filter hole one.
Through adopting above-mentioned technical scheme, sand control cloth two can effectually reduce gravel and impurity that enters into the precipitation well casing through the filtration pore, and simultaneously, sand control cloth two is through two fixed connection of sand control pipe in the inner wall of filtration pore one, and the annular table one can effectually reduce the probability that two relative filtration pores of sand control pipe take place axial slippage.
The present invention may be further configured in a preferred embodiment as: two sides of the second sand control cloth are respectively provided with a second fixed grid, the second fixed grid is used for clamping the second sand control cloth, and the edge of the outer ring of the second fixed grid is fixedly connected to the inner wall of the second sand control pipe.
Through adopting above-mentioned technical scheme, because two sand control cloth are used for doing filtration and sand control to groundwater and handle, two sand control cloth easily take place the damage under the effect of the pressure of water etc. two fixed grids can effectually be supported two sand control cloth to reduce in the use, two probability that take place the damage of sand control cloth.
The present invention may be further configured in a preferred embodiment as: and a second water filtering layer formed by laying gravel is arranged below the lower opening of the dewatering well pipe, and the second water filtering layer is positioned below the second filtering layer.
Through adopting above-mentioned technical scheme, filter layer two can do the isolation between gravel and the drainage layer one underground to reduce the possibility that drainage layer one mixes with secret earth etc..
The present invention may be further configured in a preferred embodiment as: the sand control member one comprises a sand control pipe one fixedly connected to the inner wall of the dewatering well casing and a sand control cloth one horizontally arranged in the sand control pipe one, the sand control pipe one is located at the lower end of the dewatering well casing, and the outer ring edge of the sand control cloth one is fixedly connected to the inner wall of the dewatering well casing.
Through adopting above-mentioned technical scheme, the sand prevention cloth one when groundwater infiltration, can effectually be to groundwater be filter and sand control handle to grit etc. that can effectual reduction enter into the precipitation well pipe through the under shed of precipitation well pipe, sand prevention cloth one is through a sand prevention pipe fixed connection in precipitation well pipe.
The present invention may be further configured in a preferred embodiment as: the upper side and the lower side of the first sand control cloth are respectively provided with a first fixed grid, the edge of the outer ring of one first fixed grid in the two first fixed grids is fixedly connected with a first fixed pipe which has the same central axis with the first fixed grid, and the first fixed pipe is fixedly connected to the inner wall of the first sand control pipe.
Through adopting above-mentioned technical scheme, two fixed grids can sand prevention cloth one be effectual support to in reducing the use, the probability of sand prevention cloth one emergence damage, fixed grid one is through the inner wall of a fixed pipe fixed connection in sand prevention pipe one.
The present invention may be further configured in a preferred embodiment as: a fixed pipe overcoat has rather than the rubber tube with the central axis, the outer wall fixed connection of rubber tube encircles the inner wall of precipitation well casing lower extreme inner wall has seted up the annular, and a sand control pipe joint is in the annular, the outer wall fixed connection of sand control pipe is in the lateral wall of annular.
Through adopting above-mentioned technical scheme, a sand control pipe joint in the annular, can effectually reduce in the use sand control pipe one the relative precipitation well casing take place the probability of axial displacement under the relative more condition of groundwater, simultaneously the rubber tube can be sealed between fixed pipe one and the sand control pipe one, in order to reduce the grit and impurity etc. that enter into the precipitation well casing through the clearance between sand control pipe one and the fixed pipe one, the annular can effectual increase grit in the groundwater and impurity through the clearance between the inner wall of sand control pipe one and precipitation well casing enter into the probability in the precipitation well casing promptly, in order to further reduce the sand content rate of groundwater in the precipitation well casing.
To sum up, the utility model discloses a following at least one useful technological effect:
1. when using, drainage bed one can be to the precipitation well casing support and do preliminary filtration to the water of infiltration simultaneously, filter layer one can be to the filtration pore do preliminary sand control and handle, in order to reduce the probability that the grit in the filtration bed one enters into the precipitation well casing through the filtration pore, simultaneously a plurality of filtration pores divide into two sets ofly and two sets of filtration pores equipartition respectively in the middle part and the lower part of precipitation well casing, the filtration pore that distributes in precipitation well casing middle part is less than the filtration pore of precipitation well casing lower part, can make and emit groundwater to the intraductal while of precipitation well casing can effectual reduction well casing processing's complexity, in order to optimize the result of use, and sand control spare one and sand control spare two can do further sand control respectively to the under shed and the filtration pore of precipitation well casing and handle, in order to further reduce the sand content of the intraductal water of precipitation well.
Drawings
Fig. 1 is a schematic sectional structure diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1, which is mainly used for showing the structures of the filter holes and the second sand control member.
Fig. 3 is a partially enlarged schematic view of a part B in fig. 1, which is mainly used for showing the structure of the first sand control member.
In the figure, 1, a precipitation well pipe; 11. filtering holes; 111. a first filter hole; 112. a second filter hole; 12. a submersible pump; 13. a drain pipe; 14. a well cover; 15. a ring groove; 16. a support; 2. a first filter layer; 3. filtering a water layer I; 4. a second filter layer; 5. a first sand prevention part; 51. a first sand control pipe; 52. first anti-sand cloth; 53. fixing a first grid; 54. fixing a first pipe; 541. a rubber tube; 6. a second sand prevention part; 61. a second sand control pipe; 611. a first ring platform; 62. a second sand control cloth; 621. fixing a second grid; 622. a second fixing pipe; 7. and filtering a water layer II.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a precipitation well structure, including inserting precipitation well casing 1, the filter layer 2 and the drainage layer 3 that adopt nylon cloth cladding precipitation well casing 1 outer wall of locating ground. The first water filtering layer 3 is a gravel layer structure formed by filling gravel with the grain diameter of 2-4mm on the outer side of the first filtering layer 2, the dewatering well casing 1 is vertically arranged, and the upper end of the dewatering well casing is at least 200mm higher than the ground. Wherein the inner wall of the dewatering well pipe 1 is fixedly connected with a support 16, the support 16 is fixedly connected with a submersible pump 12 used for discharging water, the drainage end of the submersible pump 12 is fixed and communicated with a drainage pipe 13 used for discharging water, the upper end of the dewatering well pipe 1 is covered and fixed with a well cover 14 covering the upper end of the dewatering well pipe, and one end of the drainage pipe 13 far away from the submersible pump 12 penetrates out of the well cover 14.
And a filter layer II 4 is formed by covering the outer wall of the filter layer I3 with geotextile, and the lower ends of the filter layer I3 and the filter layer II 4 extend to the lower opening of the dewatering well pipe 1 and plug the lower opening of the dewatering well pipe 1. Wherein a second water filtering layer 7 formed by laying gravel is arranged below the dewatering well pipe 1, and the second water filtering layer 7 is positioned below the second filtering layer 4.
Referring to fig. 1 and 2, the dewatering well casing 1 is provided with a plurality of filter holes 11 penetrating through the pipe wall along the thickness direction of the pipe wall, the plurality of filter holes 11 are divided into two groups, the two groups of filter holes 11 are respectively and uniformly distributed in the middle and the lower part of the dewatering well casing 1, wherein the number of the filter holes 11 distributed in the middle of the dewatering well casing 1 is more than the number of the filter holes 11 distributed in the lower part of the dewatering well casing 1.
The filter holes 11 comprise a first filter hole 111 and a second filter hole 112 which is the same as the first filter hole 111 in the central axis, and the first filter hole 111 is positioned on one side, away from the central axis of the dewatering well pipe 1, of the second filter hole 112. The first filter holes 111 extend obliquely downwards from the outer wall of the dewatering well casing 1 towards the central axis of the dewatering well casing 1. The axial section of the second filter hole 112 is frustum-shaped, the small diameter end of the second filter hole is communicated with the first filter hole 111, and the large diameter end of the second filter hole 112 is communicated with the interior of the dewatering well casing 1.
Filter layer two 4 can be to doing preliminary isolation between the gravel of underground and drainage layer 3 to can reduce the possibility of mixing such as drainage layer 3 and secret earth, drainage layer 3 can be to precipitation well pipe 1 do the support while to the preliminary filtration of water of infiltration, filter layer 2 can be to filtration pore 11 do preliminary sand control and handle, in order to reduce the probability that the gravel in drainage layer 3 enters into precipitation well pipe 1 through filtration pore 11.
And a second sand control member 6 for reducing the entry of impurities outside the dewatering well pipe 1 is arranged in the first filter hole 111.
Two 6 sand control spare are including two 61 sand control pipes and two 62 sand control cloth that are parallel to each other of fixed connection in the inner wall of filtration pore 111, two 62 central axis and two 62 sand control cloth of two 62 perpendicular to filtration pore 111 are located the both ends of two 61 sand control pipes respectively, two 62 axial both sides along two 61 sand control pipes of sand control cloth are provided with two fixed grids 621 respectively, two 62 sand control cloth are by the centre gripping between two fixed grids 621, the outer lane border fixedly connected with of two 621 of one of them fixed grids rather than the fixed pipe two 622 of the same central axis, two 621 fixed grids pass through bolt fixed connection, fixed pipe two 622 passes through bolt fixed connection in the inner wall of two 61 sand control pipes. The outer wall of the second sand control pipe 61 is fixedly connected with a first annular table 611 which is the same with the first annular table in the central axis, and the first annular table 611 is embedded in the wall of the first filter hole 111.
Referring to fig. 1 and 3, the lower end of the dewatering well casing 1 is provided with a sand control member one 5 for reducing the inflow of gravel from the lower opening thereof.
The inner wall surrounding the lower end of the dewatering well casing 1 is provided with a ring groove 15 which is the same as the inner wall of the lower end of the dewatering well casing 1 in the central axis direction, and the sand control part I5 comprises a sand control pipe I51 fixedly connected to the inner wall of the dewatering well casing 1 and a sand control cloth I52 which is horizontally arranged in the sand control pipe I51. The first sand control pipe 51 is arranged in the ring groove 15, and the first sand control pipe 51 is fixedly connected to the side wall of the ring groove 15 through bolts.
The upper side and the lower side of the first sand control cloth 52 are respectively provided with a first fixed grid 53, the outer ring edge of one first fixed grid 53 is fixedly connected with a first fixed pipe 54 which has the same central axis with the first fixed grid, and the first fixed pipe 54 is fixedly connected to the inner wall of the first sand control pipe 51 through bolts.
The rubber tube 541 which is the same as the first fixed tube 54 in central axis is sleeved outside the first fixed tube 54, the rubber tube 541 is clamped between the outer wall of the first fixed tube 54 and the inner wall of the first sand control tube 51, a bolt for fixing the first fixed tube 54 penetrates through the rubber tube 541 and the first sand control cloth 52, and the edge of the first sand control cloth 52 is clamped between the outer wall of the first fixed tube 54 and the inner wall of the rubber tube 541.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a precipitation well pipe structure, including inserting precipitation well pipe (1) of locating ground, adopt nylon cloth cladding in the filter layer (2) of precipitation well pipe (1) outer wall and adopt gravel pack in filter layer (2) the drainage layer (3) that the outside formed, be provided with in precipitation well pipe (1) and be used for immersible pump (12) and drain pipe (13) with water exhaust, the upper shed department lid of precipitation well pipe (1) closes and is fixed with well lid (14) and drain pipe (13) and wears out well lid (14), its characterized in that: adopt geotechnological cloth to cover drainage layer (3) and be formed with filter layer two (4), the lower extreme of drainage layer (3) and filter layer two (4) extends to the under shed department of precipitation well casing (1) and with the under shed shutoff of precipitation well casing (1), the fixedly connected with of under shed department of precipitation well casing (1) is used for doing sand control spare (5) of shutoff to the gravel, encircles a plurality of filtration pores (11) have been seted up in precipitation well casing (1), and is a plurality of filtration pore (11) divide into two sets of and two sets of filtration pores (11) equipartitions respectively in the middle part and the lower part of precipitation well casing (1), distribute in filtration pore (11) at precipitation well casing (1) middle part are less than filtration pore (11) of precipitation well casing (1) lower part, be provided with in filtration pore (11) and be used for doing filterable sand control spare two (6) to filtration pore (11).
2. A dewatering well structure as claimed in claim 1, wherein: the filtration pore (11) include filtration pore one (111) and with filtration pore one (111) with filtration pore two (112) of the central axis, filtration pore one (111) is located filtration pore two (112) and keeps away from precipitation well casing (1) the central axis one side, filtration pore one (111) is from the outer wall of precipitation well casing (1) towards its central axis slope downwardly extending, the axial cross-section of filtration pore two (112) is frustum form and its major diameter end towards precipitation well casing (1) the central axis one side, sand control spare two (6) set up in filtration pore one (111).
3. A dewatering well structure as claimed in claim 2, wherein: the sand control member two (6) includes sand control pipe two (61) and two sand control cloth two (62) that set up in sand control pipe two (61) of fixed connection in filter hole one (111) inner wall, sand control cloth two (62) are on a parallel with the radial of sand control pipe two (61), encircle the outer wall fixedly connected with ring platform one (611) of sand control pipe two (61), ring platform one (611) inlays and locates in the pore wall of filter hole one (111).
4. A dewatering well structure as claimed in claim 3, wherein: two sides of the second sand control cloth (62) are respectively provided with a second fixed grid (621), the second fixed grid (621) clamps the second sand control cloth (62) through the column, and the outer ring edge of the second fixed grid (621) is fixedly connected to the inner wall of the second sand control pipe (61).
5. A dewatering well structure as claimed in claim 1, wherein: and a second water filtering layer (7) formed by laying gravel is arranged below the lower opening of the dewatering well pipe (1), and the second water filtering layer (7) is positioned below the second filtering layer (4).
6. A dewatering well structure as claimed in claim 1, wherein: the sand control member (5) comprises a sand control pipe (51) fixedly connected to the inner wall of the dewatering well pipe (1) and a sand control cloth (52) horizontally arranged in the sand control pipe (51), the sand control pipe (51) is located at the lower end of the dewatering well pipe (1), and the outer ring edge of the sand control cloth (52) is fixedly connected to the inner wall of the dewatering well pipe (1).
7. A dewatering well structure as claimed in claim 6, wherein: the upper side and the lower side of the first sand control cloth (52) are respectively provided with a first fixed grid (53), the outer ring edge of one first fixed grid (53) of the two first fixed grids (53) is fixedly connected with a first fixed pipe (54) which has the same central axis with the first fixed grid (53), and the first fixed pipe (54) is fixedly connected to the inner wall of the first sand control pipe (51).
8. A dewatering well structure as claimed in claim 7, wherein: the utility model discloses a well casing of dewatering well, including the fixed pipe, the fixed pipe is fixed on the well casing of dewatering well casing (1), the fixed pipe (54) overcoat has rather than with the rubber tube (541) of the central axis, the outer wall fixed connection of rubber tube (541) encircles annular (15) have been seted up to dewatering well casing (1) lower extreme inner wall, sand control pipe (51) joint in annular (15), the outer wall fixed connection of sand control pipe (51) is in the lateral wall of annular (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922291739.3U CN211472544U (en) | 2019-12-18 | 2019-12-18 | Dewatering well structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922291739.3U CN211472544U (en) | 2019-12-18 | 2019-12-18 | Dewatering well structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211472544U true CN211472544U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922291739.3U Expired - Fee Related CN211472544U (en) | 2019-12-18 | 2019-12-18 | Dewatering well structure |
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| Country | Link |
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| CN (1) | CN211472544U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111962539A (en) * | 2020-09-18 | 2020-11-20 | 上海渊丰地下工程技术有限公司 | Separate type water filter pipe of dewatering well |
-
2019
- 2019-12-18 CN CN201922291739.3U patent/CN211472544U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111962539A (en) * | 2020-09-18 | 2020-11-20 | 上海渊丰地下工程技术有限公司 | Separate type water filter pipe of dewatering well |
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Granted publication date: 20200911 |