CN219453337U - Water and electricity engineering earth and stone side filling and digging observation device - Google Patents

Water and electricity engineering earth and stone side filling and digging observation device Download PDF

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Publication number
CN219453337U
CN219453337U CN202223243046.5U CN202223243046U CN219453337U CN 219453337 U CN219453337 U CN 219453337U CN 202223243046 U CN202223243046 U CN 202223243046U CN 219453337 U CN219453337 U CN 219453337U
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China
Prior art keywords
sets
observation device
base
hole
stone
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CN202223243046.5U
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Inventor
张秀勇
任亚峰
张慧
徐江湖
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Jiangxi Xunyu Engineering Management Co ltd
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Jiangxi Xunyu Engineering Management Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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Abstract

The utility model discloses a filling and excavating observation device for earth and stone of hydropower engineering, which comprises an observation device and an observation mirror, wherein a frame is sleeved on the side wall of the observation mirror, a clean square pipe is arranged in the frame, a base is installed at the lower part of the observation device, a slot is formed in the end face of the base, a horizontal cone is installed in the slot, a sealing cover is arranged at the opening of the slot, handles are welded on two sides of the base, two groups of placing grooves are formed in the lower part of the base, two groups of industrial shafts penetrate through the end face of the base in a rotating mode, two groups of telescopic square pipes are sleeved on the side walls of the industrial shafts, and supporting legs are arranged in the four groups of telescopic square pipes. The beneficial effects are that: the utility model adopts the telescopic hose, and can avoid the situation that the dust on the placing plane is lifted by the telescopic hose, thereby bringing a safety guarantee for the use of the earth and stone filling and digging observation device in the hydropower engineering.

Description

Water and electricity engineering earth and stone side filling and digging observation device
Technical Field
The utility model relates to the technical field of engineering construction, in particular to a filling and excavating observation device for earthwork of hydroelectric engineering.
Background
The topography measurement means that a series of measurement data are obtained through measurement and calculation by using a measuring instrument and a tool, or the topography of the earth surface is drawn into a topographic map, in the hydropower engineering, the earth and stone filling work is needed, in the process, an operator needs to use an observation device to observe the surrounding topography, and the actual use has the advantages of simplicity in operation, precision implementation, long service life and the like.
The prior art discloses the publication number: CN216383274U is a filling observation device for earthwork of hydroelectric engineering, comprising an observation device, an observation mirror, a frame, a base, a horizontal cone, a shell cover, supporting legs, a supporting rod, a grabbing floor, an extrusion rod, a movable groove, a circular groove, a spring, a connecting plate, a cotton rubbing plate and a shrinkage port, when in use, the supporting legs on two sides can be folded from the inside of the shrinkage port, then the grabbing floor at the bottom of the supporting rod is used for contacting with the ground, and whether the grabbing floor is in a vertical state is observed through the horizontal cone, the vertical state is horizontal, and the non-vertical state is inclined; the supporting rod can be rotated to adjust the height of the observation device according to the scale marks on the supporting leg, then the extruding rod is rotated to extrude the side surface of the joint of the supporting leg and the shrinkage port, so that the supporting leg is fixed, and the supporting legs on two sides can support and fix the observation device through the supporting rod and the floor grabbing plate; when dust exists on the mirror surface of the observation mirror, the lifting handle on the connecting plate can be pulled upwards to drive the connecting plate and the cotton rubbing plate to move upwards along the circular groove, springs on two sides can be pulled in the process to enable the springs to have elasticity, meanwhile, the cotton rubbing plate can wipe the mirror surface of the observation mirror, and when the connecting plate is loosened, the springs on two sides with elasticity can also pull the cotton rubbing plate to reset, so that the mirror surface of the observation mirror is wiped again, and the cleaning is convenient; after the observation is finished, the supporting rod can be rotated to retract into the supporting leg, and then the supporting leg is retracted into the contraction opening, so that the volume of the device can be reduced, and the device is convenient to carry and store.
When the dust collector is used in practice, the supporting feet are required to be placed on the ground, and because the use environment of the dust collector is complex, when dust exists on the placed ground, the dust on the placed plane can be lifted by the displacement of an operator or the displacement of the dust collector, and the operator sucks the dust into the lung to cause damage to the operator, so that hidden danger is brought to the use safety of the dust collector.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides a filling and digging observation device for earth and stone in hydropower engineering, which has the advantage of avoiding the situation that the dust in a placing plane is raised, thereby solving the problems in the background art.
(II) technical scheme
In order to realize the advantages that the situation that the dust in the placing plane is raised can be avoided, the utility model adopts the following specific technical scheme:
the utility model provides a water and electricity engineering earth and stone side fills digs observation device, including observation device and observation mirror, the frame has been cup jointed to the lateral wall of observation mirror, and the inside of frame is provided with clean side pipe, the base is installed to observation device's lower part, and the terminal surface of base has been seted up flutedly to grooved internally mounted has a horizontal awl, grooved opening part is provided with sealed lid, the both sides of base all weld the handle, two sets of standing grooves have been seted up to the lower part of base, the terminal surface rotation of base has two sets of worker's shaped shaft, and two sets of the lateral wall of worker's shaped shaft has all cup jointed two sets of telescopic square pipe, and four sets of telescopic square pipe's inside all is provided with the supporting leg, four sets of telescopic square pipe's lateral wall has all been run through connecting screw, and four sets of connecting screw's one end tip respectively with four sets of supporting leg's lateral wall welding, four sets of connecting screw's lateral wall has all cup jointed connecting nut, the lifter plate is installed to the below of base, bonding between base and the lifter plate has two sets of shaped guide hole, two sets of guide hole have the two sets of guide hole, two sets of guide hole have the arc-tube T has been installed, two sets of guide hole T has the guide hole, two sets of guide hole has the inside the T has, the guide hole has been set of guide hole has, the guide hole has the T has been welded the guide hole has, the guide hole has the guide hole T has the T hole has the two sets of the guide hole has the T hole has the one end T hole has, the side walls of the two groups of T-shaped rods are sleeved with telescopic springs.
Further, the lengths of the limiting ends of the two groups of T-shaped rods are larger than the diameter lengths of the two groups of guide holes.
Further, all be provided with four groups of bearings around the inside of clean side's pipe, be located two sets of on the same horizon the inside of bearing is run through and is had the rotatory roller, four sets of the lateral wall of rotatory roller has cup jointed the sponge, and is provided with glue between the both ends of sponge, one side welding of clean side's pipe has the recess board, and the screw thread through-hole has been seted up to one side of recess board to screw thread through-hole's inside has run through adjusting bolt, the through-hole has been seted up to the inside bottom surface of frame, the lower part welding of clean side's pipe has elastic spring, and elastic spring's one end runs through the through-hole, elastic spring's one end tip welding has the stopper.
Further, the threaded through hole and the adjusting bolt are mutually matched in threads.
Further, the length of the limiting block is larger than the diameter length of the through hole.
Further, the end face of the sealing cover is welded with a handle.
Further, four groups of connecting screws and four groups of connecting nut threads are mutually matched.
Further, the two groups of mounting bolts and the two groups of threaded blind holes are mutually matched in threads.
(III) beneficial effects
Compared with the prior art, the utility model provides a filling and digging observation device for earth and stone sides of hydropower engineering, which has the following beneficial effects:
(1) According to the utility model, the telescopic hoses are adopted, when the water electrician Cheng Tu stone filling observation device is actually used, an operator firstly moves the lifting plate upwards by hand, gas in the telescopic hoses can be sprayed out through the water guide pipes, meanwhile, the two groups of telescopic springs are gradually compressed by the lifting plate, when the telescopic hoses are compressed to an expected volume, the operator places the valve in water, releases the lifting plate, the two groups of telescopic springs are under the action of self elasticity and can push the lifting plate downwards, in the process, liquid can enter the telescopic hoses through the water guide pipes, when the liquid water introduction amount reaches an expected value, the operator closes the valve by hand, when the water electrician Cheng Tu stone filling observation device is needed to be placed, the operator firstly moves the valve to an expected position and then opens and closes the valve, at the moment, the operator upwards moves the lifting plate by hand, the liquid in the telescopic hoses can be sprayed out through the water guide pipes, the dust on the surface of a plane can not lift up, the dust weight can be increased through the arranged telescopic hoses, the situation that the plane dust is lifted can be avoided, and the safety of the engineering stone filling observation device is guaranteed.
(2) According to the utility model, the cleaning square tube is adopted, when the observation mirror is required to be cleaned, an operator moves the cleaning square tube upwards by hands, in the process, the sponge can be cleaned by the sponge, meanwhile, the elastic spring is gradually in a stretching state, when the surface of the sponge is provided with stains, the threaded through holes are matched with the threads of the adjusting bolts, the adjusting bolts are rotated anticlockwise by hands of operators, when the adjusting bolts are separated from the sponge, the eight groups of bearings and the four groups of rotating rollers are utilized, the operators rotate the sponge by hands to displace the sponge, when the stains on the surface of the sponge are misplaced with the observation mirror, the operators rotate the adjusting bolts clockwise by hands, when the adjusting bolts are in close contact with the sponge, the using positions of the sponge are fixed, the cleaning positions of the sponge can be replaced by the aid of the cleaning square tube, the using times of the same sponge are increased, and resources are saved for cleaning work of the water and electricity engineering earth and stone filling observation device.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a filling and excavating observation device for earth and stone sides of a hydropower project;
FIG. 2 is a schematic cross-sectional view of a base according to the present utility model;
FIG. 3 is a schematic cross-sectional view of a proposed frame of the present utility model;
FIG. 4 is a perspective view of a lifter plate according to the present utility model;
FIG. 5 is an enlarged view of FIG. 1A in accordance with the teachings of the present utility model;
FIG. 6 is an enlarged view of B of FIG. 1 in accordance with the teachings of the present utility model;
FIG. 7 is an enlarged view of FIG. 1C in accordance with the teachings of the present utility model;
FIG. 8 is an enlarged view of D of FIG. 2 in accordance with the present utility model;
fig. 9 is an enlarged view of E in fig. 3 according to the present utility model.
In the figure:
1. an observation device; 2. an observation mirror; 3. a frame; 4. cleaning a square tube; 5. a base; 6. slotting; 7. sealing cover; 8. a handle; 9. a placement groove; 10. an I-shaped shaft; 11. a telescopic square tube; 12. limiting through grooves; 13. support legs; 14. a connecting screw; 15. a coupling nut; 16. sleeving a pore plate; 17. arc through grooves; 18. installing a bolt; 19. a threaded blind hole; 20. a lifting plate; 21. a flexible hose; 22. a T-bar; 23. a guide hole; 24. a telescopic spring; 25. a water conduit; 26. a valve; 27. a bearing; 28. a rotating roller; 29. a sponge; 30. glue; 31. a groove plate; 32. a threaded through hole; 33. an adjusting bolt; 34. a through hole; 35. an elastic spring; 36. and a limiting block.
Detailed Description
For the purpose of further illustrating the various embodiments, the present utility model provides the accompanying drawings, which are a part of the disclosure of the present utility model, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present utility model, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.
According to the embodiment of the utility model, an earth and stone filling and digging observation device for hydropower engineering is provided.
The utility model will be further described with reference to the accompanying drawings and the specific embodiments, as shown in fig. 1-9, according to the embodiment of the utility model, an observation device for earth and stone filling in hydropower engineering comprises an observation device 1 and an observation mirror 2, wherein the side wall of the observation mirror 2 is sleeved with a frame 3, the inside of the frame 3 is provided with a clean square tube 4, the lower part of the observation device 1 is provided with a base 5, the end surface of the base 5 is provided with a slot 6, the inside of the slot 6 is provided with a horizontal cone, the opening of the slot 6 is provided with a sealing cover 7, two sides of the base 5 are welded with handles 8, the lower part of the base 5 is provided with two groups of placing grooves 9, the end surface of the base 5 is rotatably penetrated with two groups of worker-shaped shafts 10, the side walls of the two groups of worker-shaped shafts 10 are sleeved with two groups of telescopic square tubes 11, the inside of four groups of telescopic square tubes 11 is provided with supporting legs 13, the side walls of the four groups of telescopic square tubes 11 are provided with limiting through grooves 12, the inside of the four groups of limiting through grooves 12 are penetrated with connecting screw rods 14, one end parts of the four groups of connecting screw rods 14 are respectively welded with the side walls of the four groups of supporting legs 13, the side walls of the four groups of connecting screw rods 14 are sleeved with connecting nuts 15, a lifting plate 20 is arranged below the base 5, a flexible hose 21 is adhered between the base 5 and the lifting plate 20, two groups of threaded blind holes 19 are formed in the end face of the base 5, one end side walls of the two groups of I-shaped shafts 10 are fixedly sleeved with sleeved hole plates 16, arc-shaped through grooves 17 are formed in the end faces of the two groups of sleeved hole plates 16, mounting bolts 18 are penetrated in the two groups of arc-shaped through grooves 17, one ends of the two groups of mounting bolts 18 are respectively positioned in the two groups of threaded blind holes 19, a water guide pipe 25 is penetrated and mounted at the lower part of the lifting plate 20, a valve 26 is mounted at one end part of the water guide pipe 25, two groups of guide holes 23 have been seted up on the upper portion of lifter plate 20, and the welding of the lower part of base 5 has two sets of T shape poles 22, and two sets of guide holes 23 are run through respectively to the one end of two sets of T shape poles 22, and telescopic spring 24 has all been cup jointed to the lateral wall of two sets of T shape poles 22, through the flexible hose 21 that sets up, can avoid placing the condition emergence that the plane dust raised, bring a safety guarantee for the use of hydroelectric engineering earth and stone side filling and digging observation device.
In one embodiment, the length of the spacing ends of the two sets of T-bars 22 is greater than the diameter length of the two sets of guide holes 23, preventing the lifter plate 20 from disengaging the two sets of T-bars 22.
In one embodiment, four groups of bearings 27 are arranged at the front and rear sides of the inside of the cleaning square tube 4, the rotating rollers 28 penetrate through the inside of two groups of bearings 27 on the same horizontal line, the side walls of the four groups of rotating rollers 28 are sleeved with the sponge 29, glue 30 is arranged between two ends of the sponge 29, a groove plate 31 is welded on one side of the cleaning square tube 4, a threaded through hole 32 is formed in one side of the groove plate 31, an adjusting bolt 33 penetrates through the inside of the threaded through hole 32, a through hole 34 is formed in the bottom surface of the inside of the frame 3, an elastic spring 35 is welded at the lower part of the cleaning square tube 4, one end of the elastic spring 35 penetrates through the through hole 34, a limiting block 36 is welded at one end of the elastic spring 35, through the cleaning square tube 4, the cleaning position of the sponge 29 can be replaced, the using times of the same sponge 29 are increased, and resources are saved for cleaning work of the filling and observing device for the earthwork of the hydropower engineering.
In one embodiment, the threaded through hole 32 and the adjusting bolt 33 are threaded to each other, so as to adjust the use position of the adjusting bolt 33.
In one embodiment, the length of the stopper 36 is greater than the diameter of the through hole 34, so as to prevent the elastic spring 35 from being separated from the frame 3.
In one embodiment, the end face of the sealing cover 7 is welded with a grip which facilitates the operator to displace the sealing cover 7.
In one embodiment, the four sets of connecting screws 14 and the four sets of connecting nuts 15 are threaded to each other to facilitate adjustment of the use positions of the four sets of connecting nuts 15.
In one embodiment, the two sets of mounting bolts 18 and the two sets of threaded blind holes 19 are threadedly engaged with each other to facilitate adjustment of the use positions of the two sets of mounting bolts 18.
Working principle:
when the hydraulic engineering Cheng Tu stone filling observation device is actually used, an operator firstly moves the lifting plate 20 by hand, at the moment, gas in the telescopic hose 21 is sprayed out through the water guide pipe 25, meanwhile, two groups of telescopic springs 24 are gradually compressed by the lifting plate 20, when the telescopic hose 21 is compressed to an expected volume, the operator places the valve 26 in water, releases the lifting plate 20, the two groups of telescopic springs 24 are under the action of self elasticity and can push the lifting plate 20 downwards, in the process, liquid can enter the telescopic hose 21 through the water guide pipe 25, when the liquid water introduction amount reaches the expected value, the operator closes the valve 26 by hand, when the hydraulic engineering Cheng Tu stone filling observation device is needed to be placed, the operator firstly moves the valve 26 to an expected position, then opens and closes the valve 26, at the moment, the operator moves the lifting plate 20 by hand, the liquid in the telescopic hose 21 is sprayed out through the water guide pipe 25, when the dust on the surface of a plane is placed to contact the liquid, the weight of the dust is increased, so that the dust cannot be lifted, through the telescopic hose 21, the situation that the dust on the plane is lifted can be avoided, a safety guarantee is brought to the use of the earth and stone filling observation device in the hydropower engineering, meanwhile, when the observation mirror 2 needs to be wiped, an operator moves the cleaning square tube 4 by hands, in the process, the sponge 29 wipes the observation mirror 2, meanwhile, the elastic spring 35 is gradually in a stretching state, when the surface of the sponge 29 is provided with stains, the adjusting bolt 33 is mutually matched with threads by utilizing the threaded through hole 32 and the adjusting bolt 33, the operator rotates the adjusting bolt 33 anticlockwise by hands, when the adjusting bolt 33 is separated from the sponge 29, the operator rotates the sponge 29 by hands by utilizing the eight groups of bearings 27 and the four groups of rotating rollers 28, when the stains on the surface of the sponge 29 are misplaced with the observation mirror 2, an operator rotates the adjusting bolt 33 clockwise by hand, when the adjusting bolt 33 is in close contact with the sponge 29, the using position of the sponge 29 is fixed, the wiping position of the sponge 29 can be replaced through the cleaning square tube 4, the using times of the same sponge 29 are increased, and resources are saved for cleaning work of the filling observation device for the earthwork of the hydropower engineering.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (8)

1. The utility model provides a water and electricity engineering earth and stone side fills dig observation device, its characterized in that, including observation device (1) and observation mirror (2), frame (3) has been cup jointed to the lateral wall of observation mirror (2), and the inside of frame (3) is provided with clean square pipe (4), base (5) are installed to the lower part of observation device (1), and fluting (6) have been seted up to the terminal surface of base (5) to the internally mounted of fluting (6) has the horizontal awl, the opening part of fluting (6) is provided with sealed lid (7), handle (8) have all been welded to the both sides of base (5), two sets of standing grooves (9) have been seted up to the lower part of base (5), the terminal surface rotation of base (5) has run through two sets of shaped shaft (10), and two sets of the lateral wall of square pipe (11) have all been cup jointed to the lateral wall of shaped shaft (10), and four sets of the inside of square pipe (11) all are provided with supporting leg (13), four sets of spacing logical groove (12) have all been seted up to the lateral wall of fluting (6), and four sets of lead to screw (12) have all been connected with four sets of screw rod (14) and four screw rod (14) are all connected with the end (14), lifting plate (20) are installed to the below of base (5), bond between base (5) and lifting plate (20) flexible hose (21), two sets of screw thread blind hole (19) have been seted up to the terminal surface of base (5), two sets of one end lateral wall of worker's axle (10) is all fixed to be cup jointed orifice plate (16), and two sets of arc logical groove (17) have all been seted up to the terminal surface of cup jointing orifice plate (16), and two sets of the inside of arc logical groove (17) has all been run through mounting bolt (18), two sets of the one end of mounting bolt (18) is located two sets of respectively the inside of screw thread blind hole (19), water guide pipe (25) are installed in the lower part run through of lifting plate (20), and valve (26) are installed to the one end tip of water guide pipe (25), two sets of guide hole (23) have been seted up on the upper portion of lifting plate (20), the lower part welding of base (5) has two sets of T shape poles (22), and two sets of T shape poles (22) one end respectively runs through two sets of T shape poles (22), two sets of T shape poles (24) have all been cup jointed flexible spring (24).
2. A hydropower engineering earth and stone filling observation device according to claim 1, characterized in that the length of the limiting ends of the two sets of T-shaped rods (22) is larger than the diameter length of the two sets of guide holes (23).
3. The earth and stone filling observation device for hydropower engineering according to claim 1, wherein four groups of bearings (27) are arranged on the front and rear surfaces of the inside of the cleaning square tube (4), two groups of bearings (27) are arranged on the same horizontal line, a rotating roller (28) penetrates through the inside of the bearing, a sponge (29) is sleeved on the side wall of the rotating roller (28), glue (30) is arranged between two ends of the sponge (29), a groove plate (31) is welded on one side of the cleaning square tube (4), a threaded through hole (32) is formed in one side of the groove plate (31), an adjusting bolt (33) penetrates through the threaded through hole (32), a through hole (34) is formed in the inner bottom surface of the frame (3), an elastic spring (35) is welded on the lower portion of the cleaning square tube (4), one end of the elastic spring (35) penetrates through the through hole (34), and a limiting block (36) is welded on one end of the elastic spring (35).
4. A hydropower engineering earth and stone side filling observation device according to claim 3, characterized in that the threaded through hole (32) and the adjusting bolt (33) are mutually matched in threads.
5. A hydropower engineering earth and stone side filling observation device according to claim 3, characterized in that the length of the limiting block (36) is greater than the diameter of the through hole (34).
6. The observation device for earth and stone filling in hydropower engineering according to claim 1, wherein a grip is welded on the end face of the sealing cover (7).
7. A hydropower engineering earth and stone side filling observation device according to claim 1, characterized in that four sets of said connecting screws (14) and four sets of said connecting nuts (15) are threaded with each other.
8. A hydropower engineering earth and stone side filling observation device according to claim 1, characterized in that two sets of said mounting bolts (18) and two sets of said blind threaded holes (19) are threaded with each other.
CN202223243046.5U 2022-11-30 2022-11-30 Water and electricity engineering earth and stone side filling and digging observation device Active CN219453337U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223243046.5U CN219453337U (en) 2022-11-30 2022-11-30 Water and electricity engineering earth and stone side filling and digging observation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223243046.5U CN219453337U (en) 2022-11-30 2022-11-30 Water and electricity engineering earth and stone side filling and digging observation device

Publications (1)

Publication Number Publication Date
CN219453337U true CN219453337U (en) 2023-08-01

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ID=87386357

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223243046.5U Active CN219453337U (en) 2022-11-30 2022-11-30 Water and electricity engineering earth and stone side filling and digging observation device

Country Status (1)

Country Link
CN (1) CN219453337U (en)

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