CN112879310A - Large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure - Google Patents

Large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure Download PDF

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Publication number
CN112879310A
CN112879310A CN202011362532.1A CN202011362532A CN112879310A CN 112879310 A CN112879310 A CN 112879310A CN 202011362532 A CN202011362532 A CN 202011362532A CN 112879310 A CN112879310 A CN 112879310A
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CN
China
Prior art keywords
motor
bevel gear
deep foundation
frame
drainage
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.)
Withdrawn
Application number
CN202011362532.1A
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Chinese (zh)
Inventor
高文雅
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202011362532.1A priority Critical patent/CN112879310A/en
Publication of CN112879310A publication Critical patent/CN112879310A/en
Withdrawn legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/70Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/72Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • E02D19/10Restraining of underground water by lowering level of ground water
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/086Sealings especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/605Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Abstract

The invention discloses a drainage pump with an anti-blocking structure for large-scale ultra-deep foundation pit engineering, which comprises a device bottom frame and a drainage pump bottom plate, wherein the drainage pump bottom plate is detachably arranged at the top of the device bottom frame; a motor disposed at a front side of a top of the drain pump floor; the rear side of the top of the bottom plate of the drainage pump is provided with a drainage mechanism which can drive the motor to work; the invention relates to the technical field of constructional engineering, and discloses a drainage mechanism and a motor. This large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure drives three hornblocks through the second dwang and rotates, will drive the filter through the set rope and shake when three hornblocks rotate to avoid the condition that the jam appears in the in-process filter that draws water for a long time, thereby life-span when improving the motor, and avoided drainage mechanism because of the dead condition that appears burning out of output shaft card.

Description

Large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a drainage pump with an anti-blocking structure for large-scale ultra-deep foundation pit engineering.
Background
The building engineering refers to an engineering entity formed by the construction of various building constructions and their auxiliary facilities and the installation of lines, pipelines and equipment matched with them. The house building is characterized by comprising a top cover, a beam column, a wall, a foundation and a project which can form an internal space and meet the requirements of production, living, study and public activities of people.
Need use large-scale ultra-deep foundation ditch at present in building engineering, but the bottom of large-scale ultra-deep foundation ditch can permeate groundwater, consequently need utilize the drain pump to carry out the drainage, and the reason that blocks up can appear because of the rubble of bottom and the reason of quicksand when arranging the rivers of foundation ditch bottom to current drain pump leads to the condition that work efficiency is slower and the drain pump burns out easily.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the drainage pump with the anti-blocking structure for the large-scale ultra-deep foundation pit engineering, and solves the problems that the existing drainage pump is slow in working efficiency and easy to burn out due to blockage caused by broken stones and quicksand at the bottom when water flow at the bottom of the foundation pit is drained.
In order to achieve the purpose, the invention is realized by the following technical scheme: a drainage pump with an anti-blocking structure for large ultra-deep foundation pit engineering comprises a device bottom frame and a drainage pump bottom plate, wherein the drainage pump bottom plate is detachably arranged at the top of the device bottom frame; a motor disposed at a front side of a top of the drain pump floor; the rear side of the top of the bottom plate of the drainage pump is provided with a drainage mechanism which can drive the motor to work; the first bevel gear is arranged at the joint of the drainage mechanism and the motor; the second bevel gear is rotatably arranged above the first bevel gear and meshed with the first bevel gear; the support rod is transversely arranged on the inner wall of the device bottom frame and is positioned above the drainage mechanism; the first rotating rod can rotatably and vertically penetrate through the front side of the supporting rod through a bearing, and is fixedly connected with the second bevel gear; the driving wheel is transversely arranged at the top of the first rotating rod; the anti-blocking frame is arranged on the front side of the motor and is connected with a water inlet of the motor; the second rotating rod can rotatably and vertically penetrate through the anti-blocking frame; the driven wheel is arranged at the top of the second rotating rod and is connected with the driving wheel through a belt; the triangular block is transversely arranged at the bottom of the second rotating rod and is irregularly shaped; the filter, the filter slidable formula set up in prevent blockking up the inside of frame, and the filter with the triangle-shaped piece is connected through the set rope.
Furthermore, the upper side and the lower side of the anti-blocking frame are transversely provided with sliding chutes for the filter plate to slide, and the front wall of the inner cavity of the anti-blocking frame is provided with a return spring connected with the filter plate.
Furthermore, the anti-blocking frame is provided with two groups, wherein one group of the anti-blocking frame is transversely provided with a cutting, and the other group of the anti-blocking frame is provided with a slot matched with the cutting.
Further, it is two sets of to prevent that the surface of jam frame is the annular and is provided with the flange, the flange is provided with two sets ofly, every group be provided with waterproof pad between the flange, the inside of flange is rotationally transversely run through and is provided with the bolt.
Further, the bottom of device underframe is vertical to be provided with hollow post, the inside of hollow post is inserted and is equipped with the support column, the surface of support column is the annular and is provided with solid fixed ring, gu fixed ring's top be provided with the damping spring that device underframe bottom is connected.
Further, the bottom of support column is provided with the landing leg, the bottom of landing leg is provided with the callus on the sole, and the material of callus on the sole sets up to the rubber material.
Compared with the prior art, the invention has the beneficial effects that:
(1) this large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure, drainage mechanism through setting up will drive the motor and carry out work when starting, thereby carry out the drainage, and drainage mechanism also can drive second bevel gear through first bevel gear at the during operation and rotate, will drive the action wheel through first dwang when second bevel gear rotates and rotate, will drive when the action wheel rotates and rotate from the driving wheel through the belt, will drive the triangle-shaped piece through the second dwang when rotating from the driving wheel and rotate, will drive the filter through the noose when the triangle-shaped piece rotates and shake, thereby avoid the condition that the jam appears in the in-process filter that draws water for a long time, thereby life-span when improving the use of motor, and avoided drainage mechanism because of the output shaft card condition of dying to appear burning out, and the practicality is improved.
(2) This large-scale super deep foundation ditch engineering is with having drain pump of preventing blockking up structure, two sets of the frame of preventing blockking up that sets up can be dismantled, will make the cutting block in the inside of slot when two sets of frame equipment of preventing blockking up, thereby play the effect of preventing leaking, and make waterproof pad put into to between two sets of flanges when preventing blockking up the frame equipment, improve the leakproofness once more, avoid appearing the condition of leaking water, then can fix through the bolt, can conveniently clear up the impurity of preventing blockking up the frame inside through dismantling the setting, avoid impurity too much to cause the problem that the filter is difficult to the removal.
Drawings
FIG. 1 is a schematic structural diagram of a drainage pump with an anti-clogging structure for large-scale ultra-deep foundation pit engineering according to the present invention;
FIG. 2 is a top view of the triangular block of FIG. 1 in accordance with the present invention;
FIG. 3 is a side view of the anti-jam frame of FIG. 1 in accordance with the present invention;
fig. 4 is a partial enlarged view of the invention at a in fig. 1.
In the figure: 1-device bottom frame, 2-drainage pump bottom plate, 3-motor, 4-drainage mechanism, 5-first bevel gear, 6-second bevel gear, 7-supporting rod, 8-first rotating rod, 9-driving wheel, 10-anti-blocking frame, 11-second rotating rod, 12-driven wheel, 13-triangular block, 14-filter plate, 15-chute, 16-reset spring, 17-inserting strip, 18-slot, 19-flange, 20-waterproof pad, 21-bolt, 22-hollow column, 23-supporting column, 24-fixing ring, 25-damping spring and 26-supporting leg.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a large-scale ultra-deep foundation ditch engineering is with drain pump that has anti-clogging structure, includes device underframe 1, drain pump bottom plate 2 removable set up in the top of device underframe 1, motor 3 set up in the front side at 2 tops of drain pump bottom plate, drainage mechanism 4, the rear side at 2 tops of drain pump bottom plate is provided with and supplies the drive the drainage mechanism 4 of motor 3 work, drain pump bottom plate 2 through removable setting can conveniently dismantle the maintenance, and motor 3 of setting can carry out work when drainage mechanism 4 starts to draw the ponding of foundation ditch bottom and discharge
First bevel gear 5, first bevel gear 5 set up in drainage mechanism 4 with the junction of motor 3, second bevel gear 6 rotationally set up in first bevel gear 5's top, and second bevel gear 6 with first bevel gear 5 meshes mutually, bracing piece 7 transversely set up in the inner wall of device underframe 1 just is located drainage mechanism 4's top, first pivot pole 8 through the bearing rotationally vertical run through set up in the front side of bracing piece 7, and first pivot pole 8 with second bevel gear 6 fixed connection, action wheel 9 transversely set up in the top of first pivot pole 8.
The first bevel gear 5 that sets up can rotate at drainage mechanism 4 during operation, will drive second bevel gear 6 when first bevel gear 5 rotates and rotate, will drive first rotation pole 8 when second bevel gear 6 rotates and rotate, will drive action wheel 9 when first rotation pole 8 rotates and rotate to form the transmission.
10, prevent blockking up frame 10 set up in the front side of motor 3 and with the water inlet of motor 3 is connected, second dwang 11 rotationally vertical run through set up in prevent blockking up the inside of frame 10, from driving wheel 12 set up in the top of second dwang 11, and from driving wheel 12 with the action wheel 9 is connected through the belt, three hornblocks 13 transversely set up in the bottom of second dwang 11, and three hornblocks 13's shape is irregular shape setting, filter 14 slidable set up in prevent blockking up the inside of frame 10, and filter 14 with three hornblocks 13 are connected through the lasso.
Will drive when action wheel 9 rotates and rotate from driving wheel 12 through the belt, will drive second dwang 11 when rotating from driving wheel 12 and rotate, will drive three hornblocks 13 when second dwang 11 rotates and carry out irregular rotation, will drive filter 14 through the cover rope when three hornblocks 13 irregularly rotate and remove, can avoid appearing the condition of jam when filter 14 removes, and can accelerate filterable efficiency, improve the practicality.
The upper side and the lower side of the anti-blocking frame 10 are transversely provided with sliding grooves 15 for the filter plate 14 to slide, the front wall of the inner cavity of the anti-blocking frame 10 is provided with a return spring 16 connected with the filter plate 14, the filter plate 14 can be enabled to increase stability during moving through the arranged sliding grooves 15 and play a role in limiting, the arranged return spring 16 can enable the filter plate 14 to have the reset capacity, and the filter plate can be reset after the pulling force disappears so as to carry out secondary pulling.
The anti-blocking frame 10 is provided with two groups, wherein one group is transversely provided with a cutting 17 on the outer wall of the anti-blocking frame 10, the other group is provided with a slot 18 matched with the cutting 17 on the outer side of the anti-blocking frame 10, the anti-blocking frame 10 is provided with a flange 19 on the surface in an annular shape, the flange 19 is provided with two groups, each group is provided with a waterproof pad 20 between the flanges 19, and the inside of the flange 19 is rotatably and transversely provided with a bolt 21 in a penetrating manner.
Prevent blockking up frame 10 through two sets of settings and can dismantle, conveniently clear up the inside accumulational impurity of preventing blockking up frame 10, and the mutual riveting of cutting 17 and slot 18 through setting up, make it form labyrinth seal structure, improve the leakproofness of preventing blockking up frame 10 after the installation, reduce the condition of revealing, and the flange 19 that sets up can be connected fixedly through bolt 21, then improve the leakproofness after preventing blockking up the concatenation of frame 10 once more through waterproof pad 20.
The vertical hollow post 22 that is provided with in bottom of device underframe 1, the inside of hollow post 22 is inserted and is equipped with support column 23, the surface of support column 23 is the annular and is provided with solid fixed ring 24, gu fixed ring 24's top be provided with the damping spring 25 that is connected bottom device underframe 1, the bottom of support column 23 is provided with landing leg 26, landing leg 26's bottom is provided with the callus on the sole, and the material of callus on the sole sets up to the rubber material.
The hollow column 22 that sets up can make the top of support column 23 accomodate to its inside when the device shakes, then carries out the shock attenuation through the damping spring 25 that sets up, avoids the device to lead to the condition that the device position appears squinting because of vibrations are great when shaking, and the landing leg 26 that sets up can improve the stability of device.
When the drainage mechanism 4 is started, the motor 3 is driven to work through the output shaft when the drainage mechanism 4 is started to pump water and drain water, the first bevel gear 5 is driven to rotate when the drainage mechanism 4 is started, the second bevel gear 6 is driven to rotate when the first bevel gear 5 rotates, the first rotating rod 8 is driven to rotate when the second bevel gear 6 rotates, the driving wheel 9 is driven to rotate when the first rotating rod 8 rotates, the driven wheel 12 is driven to rotate through the belt when the driving wheel 9 rotates, the second rotating rod 11 is driven to rotate when the driven wheel 12 rotates, the triangular block 13 is driven to rotate when the second rotating rod 11 rotates, the filter plate 14 is driven to move through the sleeve rope when the triangular block 13 rotates, and the filter plate 14 moves to smoothly through the chute 15, so as to perform the work of preventing the clogging, and the return spring 16 is provided to be able to return when the pulling force of the triangular block 13 disappears, so as to perform the secondary pulling.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. The utility model provides a large-scale ultra-deep foundation ditch engineering is with having drain pump of preventing blockking up structure, includes device underframe (1), its characterized in that:
the drainage pump bottom plate (2) is detachably arranged at the top of the device bottom frame (1);
a motor (3), the motor (3) is arranged on the front side of the top of the drainage pump bottom plate (2);
the rear side of the top of the drainage pump bottom plate (2) is provided with a drainage mechanism (4) which can drive the motor (3) to work;
the first bevel gear (5), the first bevel gear (5) is arranged at the joint of the drainage mechanism (4) and the motor (3);
the second bevel gear (6) is rotatably arranged above the first bevel gear (5), and the second bevel gear (6) is meshed with the first bevel gear (5);
the supporting rod (7), the supporting rod (7) is transversely arranged on the inner wall of the device bottom frame (1) and is positioned above the drainage mechanism (4);
the first rotating rod (8) can rotatably and vertically penetrate through the front side of the supporting rod (7) through a bearing, and the first rotating rod (8) is fixedly connected with the second bevel gear (6);
the driving wheel (9), the driving wheel (9) is transversely arranged on the top of the first rotating rod (8);
the anti-blocking frame (10) is arranged on the front side of the motor (3) and is connected with a water inlet of the motor (3);
the second rotating rod (11) can rotatably and vertically penetrate through the anti-blocking frame (10);
the driven wheel (12), the driven wheel (12) is arranged on the top of the second rotating rod (11), and the driven wheel (12) is connected with the driving wheel (9) through a belt;
the triangular block (13) is transversely arranged at the bottom of the second rotating rod (11), and the triangular block (13) is irregularly shaped;
the filter plate (14), the filter plate (14) slidable set up in prevent blockking up the inside of frame (10), and filter plate (14) with triangle piece (13) are connected through the noose.
2. The drain pump with the anti-blocking structure for the large-scale ultra-deep foundation pit engineering according to claim 1, wherein: the upper side and the lower side of the anti-blocking frame (10) are transversely provided with sliding grooves (15) for the filter plate (14) to slide, and the front wall of the inner cavity of the anti-blocking frame (10) is provided with a return spring (16) connected with the filter plate (14).
3. The drain pump with the anti-blocking structure for the large-scale ultra-deep foundation pit engineering according to claim 1, wherein: the anti-blocking frame (10) is provided with two groups, wherein the outer wall of one group of the anti-blocking frame (10) is transversely provided with an inserting strip (17), and the outer side of the other group of the anti-blocking frame (10) is provided with a slot (18) matched with the inserting strip (17).
4. The drain pump with the anti-blocking structure for the large-scale ultra-deep foundation pit engineering according to claim 1, wherein: the surface of the anti-blocking frame (10) is annularly provided with two sets of flanges (19), the flanges (19) are provided with two sets, each set is provided with a waterproof pad (20) between the flanges (19), and the inside of the flanges (19) is rotatably and transversely provided with bolts (21) in a penetrating mode.
5. The drain pump with the anti-blocking structure for the large-scale ultra-deep foundation pit engineering according to claim 1, wherein: the device underframe (1) the bottom is vertical to be provided with hollow post (22), the inside of hollow post (22) is inserted and is equipped with support column (23), the surface of support column (23) is the annular and is provided with solid fixed ring (24), the top of solid fixed ring (24) be provided with damping spring (25) that device underframe (1) bottom is connected.
6. The drainage pump with the anti-blocking structure for the large-scale ultra-deep foundation pit engineering according to claim 5, wherein: the bottom of support column (23) is provided with landing leg (26), the bottom of landing leg (26) is provided with the callus on the sole, and the material of callus on the sole sets up to the rubber material.
CN202011362532.1A 2020-11-27 2020-11-27 Large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure Withdrawn CN112879310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011362532.1A CN112879310A (en) 2020-11-27 2020-11-27 Large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011362532.1A CN112879310A (en) 2020-11-27 2020-11-27 Large-scale ultra-deep foundation ditch engineering is with having drain pump that prevents blockking up structure

Publications (1)

Publication Number Publication Date
CN112879310A true CN112879310A (en) 2021-06-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114150685A (en) * 2022-01-06 2022-03-08 朱宝强 Drainage pump for large-scale deep foundation pit worker construction
CN115305937A (en) * 2022-09-14 2022-11-08 中铁七局集团南京工程有限公司 Accumulated water discharge equipment for building foundation pit for engineering construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114150685A (en) * 2022-01-06 2022-03-08 朱宝强 Drainage pump for large-scale deep foundation pit worker construction
CN115305937A (en) * 2022-09-14 2022-11-08 中铁七局集团南京工程有限公司 Accumulated water discharge equipment for building foundation pit for engineering construction

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Application publication date: 20210601

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