CN112392054A - Continuous drainage device for foundation pit support - Google Patents
Continuous drainage device for foundation pit support Download PDFInfo
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- CN112392054A CN112392054A CN202011441226.7A CN202011441226A CN112392054A CN 112392054 A CN112392054 A CN 112392054A CN 202011441226 A CN202011441226 A CN 202011441226A CN 112392054 A CN112392054 A CN 112392054A
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- pumping
- foundation pit
- transmission
- fixed
- continuous drainage
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of foundation pit supporting, and discloses a continuous drainage device for foundation pit supporting. The invention enables the pumping mechanism to float on the surface of accumulated water in the foundation pit, replaces the traditional sedimentation type pumping mode, not only can prevent foreign matters such as impurities, silt and the like mixed at the bottom of the accumulated water from blocking the high-pressure water pump, but also can enable the pumping pipe to always float on the water surface, ensures the high efficiency of the accumulated water pumping, and can flexibly adjust the pumping position of the pumping mechanism by longitudinally pushing the pumping mechanism through the propeller in the longitudinal pushing pipe and transversely pushing the pumping mechanism through the transverse pushing mechanism bag in the pumping process.
Description
Technical Field
The invention relates to the technical field of foundation pit support, in particular to a continuous drainage device for foundation pit support.
Background
The foundation pit is a soil pit excavated at the designed position of the foundation according to the elevation of the foundation and the plane size of the foundation, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site before excavation, waterproof and drainage work is performed, a slope can be placed for people who do not excavate deeply to stabilize the soil slope, the slope is determined according to relevant construction engineering regulations, people who excavate deeper buildings and nearby buildings can use a foundation pit wall supporting method and a concrete spraying wall protecting method, a large foundation pit even adopts methods of interlocking an underground continuous wall and a column-type bored concrete pile, and after the foundation pit is excavated and formed, a large amount of sewage is easily accumulated in the foundation pit due to water seepage, rain weather and the like, and the accumulated water needs to be drained for ensuring the stability of the foundation pit support.
But there are some shortcomings about the continuous drainage device that excavation supporting used in the existing market, and traditional drainage device is mostly subside formula drainage form, and it is very easily attached foreign matters such as impurity, sweeps in the water pump with the pump, leads to the water pump to block up, influences the efficiency of drainage, and in drainage process, nimble usability is not enough, needs the staff frequently to change the position of drawing water of drinking-water pipe, easily increases staff's intensity of labour. Accordingly, one skilled in the art has provided a continuous drainage apparatus for use in foundation pit support to solve the problems set forth in the background art described above.
Disclosure of Invention
The invention aims to provide a continuous drainage device for foundation pit support, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a continuous drainage device for excavation supporting, includes supporting platform, supporting platform's below all is provided with the removal gyro wheel in four corner position departments, and one side of supporting platform is located middle part position department and is provided with the link, supporting platform's top is located one side position department and is fixed with high pressure water pump, and supporting platform's top is located opposite side position department and is provided with clamping mechanism, the inboard block of bearing cardboard has pumping mechanism among the clamping mechanism.
As a still further scheme of the invention: clamping mechanism fixes the location base of both sides around the supporting platform top including the symmetry, the inboard of location base is located middle part position department and rotates and is connected with the transmission lead screw, and the inboard of location base is located both ends position department symmetry and is fixed with the transmission slide bar, the top of transmission lead screw is fixed with rotatory hand wheel, and the outside symmetry of transmission lead screw has cup jointed the nut, the outside symmetry of transmission slide bar has cup jointed the location sliding sleeve, the top of cup jointing nut and location sliding sleeve all is fixed with the transmission grillage, the top of transmission grillage is located both ends position department symmetry and is fixed with the bearing cardboard.
As a still further scheme of the invention: the transmission screw rod takes a center line as a boundary, positive and negative screw teeth which are symmetrically arranged are respectively arranged on two sides of the center line, and the transmission screw rod is symmetrically sleeved and slid with the sleeving nut through the positive and negative screw teeth.
As a still further scheme of the invention: the quantity of bearing cardboard is two sets of, and every group is two, the bearing cardboard is T shape structure, and the clamping face bonding of bearing cardboard has the antiskid cushion.
As a still further scheme of the invention: the mechanism of drawing water includes that the clamping is at the inboard casing that draws water of bearing cardboard, the top of the casing that draws water is located middle part position department embedding and is provided with the port of drawing water, and draws water the below of casing and be located middle part position department from outer inwards fixed gradually and have just imitate filter screen, high-efficient filter screen, the inboard of the casing that draws water is located corner position department symmetric connection and has the float valve, and the rear side symmetry of the casing that draws water is fixed with horizontal pushing mechanism.
As a still further scheme of the invention: the primary filter screen and the high-efficiency filter screen are both made of stainless steel components, and the aperture of the filter hole of the high-efficiency filter screen is one third of that of the primary filter screen.
As a still further scheme of the invention: the quantity of float valve is four groups, and the float valve is for four corner intercrossing symmetric arrangement of the casing that draws water, the float valve adopts the natural rubber material component.
As a still further scheme of the invention: the front side and the rear side of the water pumping shell are symmetrically fixed with longitudinal pushing pipes in the middle, and propellers are arranged on the inner sides of the longitudinal pushing pipes.
As a still further scheme of the invention: horizontal push mechanism fixes the horizontal propelling movement casing in the casing both sides that draws water including the symmetry, the inboard of horizontal propelling movement casing is located bottom position department and rotates and be connected with the transmission main shaft, and the rear side of horizontal propelling movement casing is located top position department and is fixed with drive motor, drive motor's end fixing has the driving gear, the end of transmission main shaft is fixed with driven gear, and the outside of transmission main shaft cup joints and is fixed with the propelling movement paddle.
As a still further scheme of the invention: the teeth of the driving gear are meshed with the teeth of the driven gear, and the transmission motor is rotatably connected with the transmission main shaft through the driving gear and the driven gear.
As a still further scheme of the invention: the number of the pushing paddles is three, and each group is not less than six.
Compared with the prior art, the invention has the beneficial effects that:
the invention enables the pumping mechanism to float on the surface of accumulated water in the foundation pit, replaces the traditional sedimentation type pumping mode, not only can prevent impurities, silt and other foreign matters at the bottom of the accumulated water from blocking the high-pressure water pump, but also can enable the pumping pipe to always float on the water surface, ensures the high efficiency of the accumulated water pumping, can flexibly adjust the pumping position of the pumping mechanism by longitudinally pushing the pumping mechanism by the propeller in the longitudinal pushing pipe and transversely pushing the pumping mechanism by the transverse pushing mechanism bag in the pumping process, enables the pumping mechanism to flexibly pump and treat the accumulated water in the foundation pit, and can be convenient for workers to move the drainage device by clamping the support of the pumping mechanism by the clamping mechanism bag.
Drawings
FIG. 1 is a schematic diagram of a continuous drainage apparatus for use in retaining and protecting a foundation pit;
FIG. 2 is a schematic diagram of a clamping mechanism in a continuous drainage apparatus for use in retaining and protecting a foundation pit;
FIG. 3 is a schematic diagram of a water pumping mechanism in a continuous drainage apparatus for use in retaining and protecting a foundation pit;
FIG. 4 is a plan view of a pumping mechanism in a continuous drainage apparatus for use in retaining and retaining a foundation pit;
FIG. 5 is a top view of a pumping mechanism in a continuous drainage apparatus for use in retaining and retaining a foundation pit;
fig. 6 is a schematic structural diagram of a transverse pushing mechanism in a continuous drainage device for foundation pit support.
In the figure: 1. a support platform; 2. moving the roller; 3. a high pressure water pump; 4. rotating a hand wheel; 5. a positioning base; 6. supporting the clamping plate; 7. a water pumping shell; 8. hanging a ring; 9. a transmission plate frame; 10. a transmission screw rod; 11. a transmission slide bar; 12. positioning the sliding sleeve; 13. sleeving a nut; 14. a water pumping port; 15. a propeller; 16. longitudinally pushing the tube; 17. a float valve; 18. transversely pushing the shell; 19. a primary filter screen; 20. a high-efficiency filter screen; 21. a transmission main shaft; 22. pushing the paddle; 23. a drive motor; 24. a driving gear; 25. a driven gear.
Detailed Description
Referring to fig. 1 to 6, in an embodiment of the present invention, a continuous drainage apparatus for supporting a foundation pit includes a supporting platform 1, moving rollers 2 are disposed at four corner positions below the supporting platform 1, a hanging ring 8 is disposed at a middle position of one side of the supporting platform 1, a high pressure water pump 3 is fixed at a position of one side of the supporting platform 1, a clamping mechanism is disposed at a position of the other side of the supporting platform 1, the clamping mechanism includes positioning bases 5 symmetrically fixed at front and rear sides above the supporting platform 1, a transmission screw rod 10 is rotatably connected at a position of the middle of the inner side of the positioning base 5, transmission slide rods 11 are symmetrically fixed at positions of two ends of the inner side of the positioning base 5, a rotary hand wheel 4 is fixed at a top end of the transmission screw rod 10, and coupling nuts 13 are symmetrically sleeved on an outer side of the transmission screw rod 10, the outer side of a transmission slide bar 11 is symmetrically sleeved with a positioning slide sleeve 12, a transmission plate frame 9 is fixed above a sleeve nut 13 and the positioning slide sleeve 12, bearing clamp plates 6 are symmetrically fixed above the transmission plate frame 9 at two ends, the transmission screw rod 10 uses a central line as a boundary, and positive and negative screw teeth which are symmetrically arranged are respectively arranged at two sides of the central line, the transmission screw rod 10 is symmetrically sleeved and slid with the sleeve nut 13 through the positive and negative screw teeth, the number of the bearing clamp plates 6 is two, each group is two, the bearing clamp plate 6 is of a T-shaped structure, and an anti-skid rubber pad is adhered to a clamping surface of the bearing clamp plate 6, when the drainage device is assembled and used, a worker places a pumping mechanism right above a positioning base 5, and then rotates a rotary hand wheel 4 to drive the transmission screw rod 10 to rotate, the positive and negative screw teeth which are symmetrically arranged on the transmission screw rod 10, under the matching combination of the positioning sliding sleeve 12 and the transmission sliding rod 11, the sleeve nuts 13 are driven to symmetrically slide on the transmission screw rod 10, and the transmission plate frame 9 is synchronously driven to symmetrically slide in a closed manner, so that the bearing clamping plate 6 carries out bearing clamping on two ends of the water pumping shell 7 in the water pumping mechanism, and a worker can conveniently move the drainage device to a specified position for water pumping treatment.
The inner side of a bearing clamping plate 6 in the clamping mechanism is clamped with a water pumping mechanism, the water pumping mechanism comprises a water pumping shell 7 clamped and fixed on the inner side of the bearing clamping plate 6, a water pumping port 14 is embedded in the middle position above the water pumping shell 7, a primary filter screen 19 and a high-efficiency filter screen 20 are sequentially fixed in the middle position below the water pumping shell 7 from outside to inside, floating valves 17 are symmetrically connected to the corners of the inner side of the water pumping shell 7, the primary filter screen 19 and the high-efficiency filter screen 20 are both made of stainless steel components, the aperture of a filter hole of the high-efficiency filter screen 20 is one third of that of the primary filter screen 19, the number of the floating valves 17 is four groups, the floating valves 17 are mutually crossed and symmetrically arranged relative to the four corners of the water pumping shell 7, the floating valves 17 are made of natural rubber materials, and in the process of draining the accumulated water in the foundation pit, a worker moves the drainage, and then the staff is connected the both ends of drinking-water pipe with high pressure water pump 3 and pumping port 14 respectively, connect the back, will pump water the casing 7 and arrange in ponding, under the buoyancy of float valve 17, make the casing 7 of pumping water float on the ponding surface, synchronous messenger's pumping port 14 submergence is under the surface of water, and then high pressure water pump 3 works, under the double filtration of just imitating filter screen 19 and high-efficient filter screen 20, with clean ponding through pumping port 14 input to the drinking-water pipe in, under high pressure water pump 3's continuous work, discharge that foundation ditch ponding lasts.
A transverse pushing mechanism is symmetrically fixed on the rear side of the pumping shell 7, a longitudinal pushing pipe 16 is symmetrically fixed at the middle position of the front side and the rear side of the pumping shell 7, a propeller 15 is arranged on the inner side of the longitudinal pushing pipe 16, when the pumping position needs to be moved longitudinally in the process of extracting accumulated water in a foundation pit, the propeller 15 works to push the accumulated water reversely, so that the pumping shell 7 moves longitudinally on the surface of the accumulated water, the pumping port 14 is moved to a designated position, the transverse pushing mechanism comprises transverse pushing shells 18 symmetrically fixed on the two sides of the pumping shell 7, the inner side of the transverse pushing shell 18 at the bottom position is rotatably connected with a transmission main shaft 21, a transmission motor 23 is fixed at the top position of the rear side of the transverse pushing shell 18, a driving gear 24 is fixed at the end of the transmission motor 23, and a driven gear 25 is fixed at the tail end of the transmission main shaft 21, and the outer side of the transmission main shaft 21 is fixedly sleeved with a pushing paddle 22, the teeth of the driving gear 24 are meshed with the teeth of the driven gear 25, the transmission motor 23 is rotatably connected with the transmission main shaft 21 through the driving gear 24 and the driven gear 25, the number of the pushing paddles 22 is three, each group is not less than six, in the process of extracting accumulated water in the foundation pit, when the water pumping position needs to be transversely moved, the transmission motor 23 works to drive the driving gear 24 to rotate, the transmission main shaft 21 is driven to rotate through the meshing of the driving gear 24 and the driven gear 25, the pushing paddle 22 is synchronously driven to rotate, the accumulated water is reversely pushed, the water pumping shell 7 is enabled to transversely move on the surface of the accumulated water, and the water pumping port 14 is moved to the designated position.
The working principle of the invention is as follows: in the process of assembling and using the drainage device, a worker places the pumping mechanism right above the positioning base 5, then the worker rotates the rotating hand wheel 4 to drive the transmission screw rod 10 to rotate, under the matched combination of the positioning sliding sleeve 12 and the transmission sliding rod 11, the working personnel drives the sleeve nut 13 to symmetrically slide on the transmission screw rod 10 through the positive and negative screw teeth which are symmetrically arranged on the transmission screw rod 10, the transmission plate frame 9 is synchronously driven to symmetrically close and slide, so that the bearing clamping plate 6 bears and clamps two ends of the pumping shell 7 in the pumping mechanism, the worker can move the drainage device to a specified position for pumping water, the worker moves the drainage device to the specified position, then the worker connects two ends of the pumping pipe with the high-pressure water pump 3 and the pumping port 14 respectively, after the connection is finished, the pumping shell 7 is placed in the accumulated water, under the buoyancy action of the float valve 17, the pumping shell 7 floats on the surface of the accumulated water, the pumping port 14 is synchronously immersed under the water surface, the high-pressure water pump 3 works, under the double filtration of the primary filter screen 19 and the high-efficiency filter screen 20, the clean accumulated water is input into the pumping pipe through the pumping port 14, under the continuous work of the high-pressure water pump 3, the accumulated water in the foundation pit is continuously discharged, synchronously in the process of pumping the accumulated water in the foundation pit, when the pumping position needs to be longitudinally moved, the propeller 15 works to reversely push the accumulated water, so that the pumping shell 7 longitudinally moves on the surface of the accumulated water, the pumping port 14 is moved to a specified position, when the pumping position needs to be transversely moved, the transmission motor 23 works to drive the driving gear 24 to rotate, the driving gear 24 is meshed with the teeth of the driven gear 25 to drive the transmission main shaft 21 to rotate, and the pushing paddle 22 is synchronously driven to rotate, and (4) reversely pushing the accumulated water to enable the water pumping shell 7 to transversely move on the surface of the accumulated water, and moving the water pumping port 14 to a specified position to perform continuous water pumping work.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (11)
1. The utility model provides a continuous drainage device for excavation supporting, includes supporting platform (1), its characterized in that, the below of supporting platform (1) is located four corner positions and all is provided with removal gyro wheel (2), and one side of supporting platform (1) is located middle part position department and is provided with link (8), the top of supporting platform (1) is located one side position department and is fixed with high pressure water pump (3), and the top of supporting platform (1) is located opposite side position department and is provided with clamping mechanism, the inboard block of bearing cardboard (6) has pumping mechanism in the clamping mechanism.
2. A continuous drainage apparatus for use in foundation pit support according to claim 1, the clamping mechanism comprises positioning bases (5) which are symmetrically fixed on the front side and the rear side above the supporting platform (1), the inner side of the positioning base (5) is rotatably connected with a transmission screw rod (10) at the middle position, and the inner side of the positioning base (5) is symmetrically fixed with transmission slide bars (11) at the positions of two ends, the top end of the transmission screw rod (10) is fixed with a rotary hand wheel (4), and the outer side of the transmission screw rod (10) is symmetrically sleeved with a sleeve nut (13), the outer side of the transmission slide rod (11) is symmetrically sleeved with a positioning sliding sleeve (12), a transmission plate frame (9) is fixed above the sleeve nut (13) and the positioning sliding sleeve (12), and bearing clamping plates (6) are symmetrically fixed at the positions of two ends above the transmission plate frame (9).
3. The continuous drainage device for foundation pit support according to claim 2, wherein the transmission screw rod (10) is bounded by a central line, and positive and negative screw teeth which are symmetrically arranged with each other are respectively arranged on two sides of the central line, and the transmission screw rod (10) is symmetrically sleeved and slid with the sleeve nut (13) through the positive and negative screw teeth.
4. The continuous drainage device for foundation pit support according to claim 2, wherein the number of the supporting clamping plates (6) is two, each group is two, the supporting clamping plates (6) are T-shaped structures, and the clamping surfaces of the supporting clamping plates (6) are adhered with anti-skid rubber pads.
5. The continuous drainage device for foundation pit support according to claim 1 and 2, characterized in that the pumping mechanism comprises a pumping shell (7) fixed on the inner side of the bearing clamping plate (6), a pumping port (14) is embedded in the middle position above the pumping shell (7), a primary filter screen (19) and a high-efficiency filter screen (20) are sequentially fixed on the middle position below the pumping shell (7) from outside to inside, a float valve (17) is symmetrically connected on the corner position on the inner side of the pumping shell (7), and a transverse pushing mechanism is symmetrically fixed on the rear side of the pumping shell (7).
6. A continuous drainage device for foundation pit support according to claim 5, characterized in that the primary filter screen (19) and the high efficiency filter screen (20) are both stainless steel members, and the aperture of the filter hole of the high efficiency filter screen (20) is one third of the aperture of the filter hole of the primary filter screen (19).
7. The continuous drainage device for foundation pit support according to claim 5, wherein the number of the floating valves (17) is four, the floating valves (17) are symmetrically arranged in a cross way relative to four corners of the pumping shell (7), and the floating valves (17) are made of natural rubber.
8. A continuous drainage device for foundation pit support according to claim 5, wherein the longitudinal pushing pipe (16) is symmetrically fixed at the middle position of the front side and the rear side of the pumping shell (7), and the inner side of the longitudinal pushing pipe (16) is provided with a propeller (15).
9. The continuous drainage device for foundation pit support according to claim 5, wherein the transverse pushing mechanism comprises transverse pushing shells (18) symmetrically fixed on two sides of the pumping shell (7), the inner sides of the transverse pushing shells (18) are rotatably connected with a transmission main shaft (21) at the bottom end position, the rear sides of the transverse pushing shells (18) are fixed with a transmission motor (23) at the top end position, the end parts of the transmission motor (23) are fixed with driving gears (24), the tail ends of the transmission main shafts (21) are fixed with driven gears (25), and the outer sides of the transmission main shafts (21) are sleeved and fixed with pushing paddles (22).
10. A continuous drainage apparatus for supporting a foundation pit according to claim 9, wherein the teeth of the driving gear (24) are engaged with the teeth of the driven gear (25), and the transmission motor (23) is rotatably connected with the transmission main shaft (21) through the driving gear (24) and the driven gear (25).
11. A continuous drainage apparatus for use in foundation pit support according to claim 9, wherein the number of push paddles (22) is three groups of not less than six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011441226.7A CN112392054A (en) | 2020-12-11 | 2020-12-11 | Continuous drainage device for foundation pit support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011441226.7A CN112392054A (en) | 2020-12-11 | 2020-12-11 | Continuous drainage device for foundation pit support |
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| Publication Number | Publication Date |
|---|---|
| CN112392054A true CN112392054A (en) | 2021-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011441226.7A Pending CN112392054A (en) | 2020-12-11 | 2020-12-11 | Continuous drainage device for foundation pit support |
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| Country | Link |
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| CN (1) | CN112392054A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653080A (en) * | 2021-09-23 | 2021-11-16 | 陕西建工集团有限公司 | Drainage device and method for construction site |
| 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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| US20090007321A1 (en) * | 2006-03-29 | 2009-01-08 | Young Boung Kang | Drainage apparatus for a sink |
| CN209482332U (en) * | 2018-12-13 | 2019-10-11 | 深圳宏业基岩土科技股份有限公司 | The water plug of adaptive water level for foundation pit yard drain |
| CN210395216U (en) * | 2019-08-07 | 2020-04-24 | 贾丽 | Municipal administration road water supply and drainage device |
| CN211113693U (en) * | 2019-11-22 | 2020-07-28 | 广东省水利水电第三工程局有限公司 | Hydraulic engineering construction is with preventing blockking up drainage device |
| CN211516330U (en) * | 2019-12-23 | 2020-09-18 | 邯郸市多飞紧固件制造有限公司 | Tool for nut machining |
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2020
- 2020-12-11 CN CN202011441226.7A patent/CN112392054A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090007321A1 (en) * | 2006-03-29 | 2009-01-08 | Young Boung Kang | Drainage apparatus for a sink |
| CN209482332U (en) * | 2018-12-13 | 2019-10-11 | 深圳宏业基岩土科技股份有限公司 | The water plug of adaptive water level for foundation pit yard drain |
| CN210395216U (en) * | 2019-08-07 | 2020-04-24 | 贾丽 | Municipal administration road water supply and drainage device |
| CN211113693U (en) * | 2019-11-22 | 2020-07-28 | 广东省水利水电第三工程局有限公司 | Hydraulic engineering construction is with preventing blockking up drainage device |
| CN211516330U (en) * | 2019-12-23 | 2020-09-18 | 邯郸市多飞紧固件制造有限公司 | Tool for nut machining |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653080A (en) * | 2021-09-23 | 2021-11-16 | 陕西建工集团有限公司 | Drainage device and method for construction site |
| 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: 20210223 |