CN216662905U - Concrete curing means is used in tunnel engineering construction - Google Patents

Concrete curing means is used in tunnel engineering construction Download PDF

Info

Publication number
CN216662905U
CN216662905U CN202220501756.4U CN202220501756U CN216662905U CN 216662905 U CN216662905 U CN 216662905U CN 202220501756 U CN202220501756 U CN 202220501756U CN 216662905 U CN216662905 U CN 216662905U
Authority
CN
China
Prior art keywords
plate
sliding
frame
water
motor
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.)
Expired - Fee Related
Application number
CN202220501756.4U
Other languages
Chinese (zh)
Inventor
孙永震
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202220501756.4U priority Critical patent/CN216662905U/en
Application granted granted Critical
Publication of CN216662905U publication Critical patent/CN216662905U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

The utility model provides a concrete curing device for tunnel engineering construction, which comprises a telescopic component and a lifting component, wherein the telescopic component comprises a connecting rod, a connecting plate, a sliding plate, a first threaded rod, a guide column and a first motor; the two sides of the sliding plate are respectively and rotatably connected with a connecting rod through a pin shaft, one end, far away from the sliding plate, of the connecting rod is rotatably connected with a connecting plate, the first threaded rod is driven to rotate through a first motor, the sliding plate drives the connecting rod, the connecting rod drives the connecting plate, the connecting plate drives the annular plate to fall, the occupied space of the device is reduced, the second threaded rod is driven to rotate through a second motor, the sliding block drives the sliding column to slide downwards in the fixed sleeve, the spraying assembly moves downwards integrally, the space occupied by the maintenance device in the tunnel is reduced through the telescopic assembly and the lifting assembly, and the influence on site construction and the probability of potential safety hazard are reduced.

Description

Concrete curing means is used in tunnel engineering construction
Technical Field
The utility model relates to the technical field of concrete curing, in particular to a concrete curing device for tunnel engineering construction.
Background
Concrete curing is the artificial creation of certain humidity and temperature conditions that allow the concrete to be normal or accelerate its hardening and strength growth. Concrete is therefore able to harden and develop strength gradually as a result of the hydration of cement, which requires certain temperature and humidity conditions. If the surrounding environment does not have the condition, then need the manual work to carry out the maintenance to the concrete, current tunnel concrete promotes curing means by the workman and sprays the water smoke to tunnel concrete when the maintenance to reach the maintenance effect.
Because tunnel curing means need all-round spraying just can reach better effect when the maintenance concrete, so most curing means are the annular, and nevertheless when the maintenance work finishes, annular curing means will occupy a large amount of spaces in the tunnel, influences workman's site operation easily, and is comparatively inconvenient, also appears the potential safety hazard in addition easily, for this reason, proposes a concrete curing means for the tunnel engineering construction.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention are intended to provide a concrete curing device for tunnel engineering construction, so as to solve or alleviate the technical problems in the prior art, and to provide at least one useful choice.
The technical scheme of the embodiment of the utility model is realized as follows: a concrete curing device for tunnel engineering construction comprises a telescopic component and a lifting component, wherein the telescopic component comprises a connecting rod, a connecting plate, a sliding plate, a first threaded rod, a guide column and a first motor;
the two sides of the sliding plate are rotatably connected with connecting rods through pin shafts, one end of each connecting rod, which is far away from the sliding plate, is rotatably connected with a connecting plate, one end of each first threaded rod penetrates through the center of the lower surface of the sliding plate and is in threaded connection with the sliding plate, and one end of each guide post penetrates through the lower surface of the sliding plate and is in sliding connection with the sliding plate;
the lifting assembly comprises a second fixing plate, a sliding block, a second threaded rod, a fixing column, a second motor and a third fixing plate;
one end of the second threaded rod penetrates through the center of the sliding block and is in threaded connection with the sliding block, one end of the second threaded rod is rotatably connected to the lower surface of the second fixing plate, and the second fixing plate is fixedly connected with the third fixing plate through the fixing column.
Further preferably, the one end of first threaded rod is rotated through the bearing and is connected with first fixed plate, the other end of first threaded rod and the output shaft fixed connection of first motor, the upper surface of first fixed plate and the one end fixed connection of guide post, the symmetrical welding in one side of fixed column has two connecting blocks, the second motor is installed in the upper surface of third fixed plate, through the motion of first motor control telescopic component, and fixed second motor makes this device work more stable simultaneously.
Preferably, the upper surface of the connecting plate is provided with a spraying assembly, and the spraying assembly comprises a spray head, an annular plate, a three-way water pipe, a fixing ring, a water supply hose, a water inlet pipe, a water storage tank, a water outlet pipe and a water pump;
the utility model discloses a concrete curing device, including connecting plate, water supply hose, water pump, water inlet pipe and outlet pipe, the last skin weld of connecting plate has the annular slab, the shower nozzle is installed to the upper surface symmetry of annular slab, water supply hose passes through solid fixed ring fixed connection in the inner wall of annular slab, the shower nozzle passes through tee bend water pipe and water supply hose intercommunication, the water pump is installed to water supply hose's one end, the water pump is installed in the inner diapire of storage water tank, inlet tube and outlet pipe are installed to one side of storage water tank, and through above setting, the shower nozzle can spray out the water smoke, reaches the effect of concrete curing.
Preferably, a support assembly is mounted on one side of the first fixing plate, and comprises a switch group, a first frame, a second frame, universal wheels, a hand pushing frame, a support rod, a protection plate, a sliding column and a fixing sleeve;
the utility model discloses a shallow trench isolation device, including first fixed plate, sliding column, fixed sleeve, push handle frame, switch group, bracing piece, four universal wheels, through above setting, make this device stable in structure, the efficiency is higher in the work.
Further preferably, the sliding block is welded on one side of the sliding column, the third fixing plate is welded on one side of the fixing sleeve, and the third fixing plate is used for fixing the position of the lifting assembly, so that the working state is more stable.
Preferably, the connecting block is welded on one side of the fixing sleeve, and the first motor is mounted on the other side of the sliding column to fix the position of the first motor, so that the device is more stable in structure.
Preferably, one end of the annular plate is rotatably connected to the top of the front surface of the sliding column, the water storage tank is mounted on the inner wall of the first frame, the storage battery is mounted at the bottom of the water storage tank, and the device provides power through the storage battery.
Preferably, the electrical output end of the storage battery is electrically connected with the electrical input end of the switch group through a wire, the electrical output end of the switch group is electrically connected with the electrical input ends of the first motor, the second motor and the water pump through wires, and the switch group is used for controlling the operation of the device.
Compared with the prior art, the utility model has the beneficial effects that: according to the device, the first motor drives the first threaded rod to rotate, the sliding plate drives the connecting rod, the connecting rod drives the connecting plate, the connecting plate drives the annular plate to fall, the space occupied by the device is reduced, the second motor drives the second threaded rod to rotate, the sliding block drives the sliding column to slide downwards in the fixed sleeve, and the spraying assembly moves downwards integrally.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a structure according to the present invention;
FIG. 2 is a schematic view of another embodiment of the present invention;
FIG. 3 is a schematic view of the telescoping assembly of the present invention;
FIG. 4 is a schematic structural view of a spray assembly of the present invention;
fig. 5 is a schematic view of the structure of the water storage tank of the present invention.
Reference numerals: 10. a telescoping assembly; 1. a connecting rod; 2. a connecting plate; 3. a sliding plate; 4. a first threaded rod; 5. a guide post; 6. a first fixing plate; 7. a first motor; 20. a lifting assembly; 21. a second fixing plate; 22. a slider; 23. a second threaded rod; 24. fixing a column; 25. connecting blocks; 26. a second motor; 27. a third fixing plate; 30. a spray assembly; 31. a spray head; 32. an annular plate; 33. a three-way water pipe; 34. a fixing ring; 35. a water supply hose; 36. a water inlet pipe; 37. a water storage tank; 38. a water outlet pipe; 39. a water pump; 40. a storage battery; 401. a support assembly; 41. a switch group; 42. a first frame; 43. a second frame; 44. a universal wheel; 45. a hand pushing frame; 47. a support bar; 48. a protection plate; 49. a sliding post; 50. and fixing the sleeve.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, an embodiment of the present invention provides a concrete curing device for tunnel engineering construction, including a telescopic assembly 10 and a lifting assembly 20, where the telescopic assembly 10 includes a connecting rod 1, a connecting plate 2, a sliding plate 3, a first threaded rod 4, a guide column 5 and a first motor 7;
both sides of the sliding plate 3 are rotatably connected with connecting rods 1 through pin shafts, one end of each connecting rod 1, which is far away from the sliding plate 3, is rotatably connected with a connecting plate 2, one end of each first threaded rod 4 penetrates through the center of the lower surface of the sliding plate 3 and is in threaded connection with the sliding plate 3, and one end of each guide post 5 penetrates through the lower surface of the sliding plate 3 and is in sliding connection with the sliding plate 3;
the lifting assembly 20 comprises a second fixing plate 21, a sliding block 22, a second threaded rod 23, a fixing column 24, a second motor 26 and a third fixing plate 27;
one end of the second threaded rod 23 penetrates through the center of the sliding block 22 and is in threaded connection with the sliding block 22, one end of the second threaded rod 23 is rotatably connected to the lower surface of the second fixing plate 21, and the second fixing plate 21 and the third fixing plate 27 are fixedly connected through the fixing column 24.
In this embodiment, specifically: one end of first threaded rod 4 is connected with first fixed plate 6 through the bearing rotation, the other end of first threaded rod 4 and the output shaft fixed connection of first motor 7, the upper surface of first fixed plate 6 and the one end fixed connection of guide post 5, the one side symmetric welding of fixed column 24 has two connecting blocks 25, second motor 26 is installed in the upper surface of third fixed plate 27, through above setting, first motor 7 drives first threaded rod 4 and rotates, first fixed plate 6 is used for the position of fixed flexible subassembly 10, make overall stability, guide post 5 is sliding plate 3 guide moving direction, prevent that sliding plate 3 from following first threaded rod 4 and rotating, lead to flexible subassembly 10 unable work, connecting block 25 and third fixed plate 27 are used for the position of fixed elevating module 20, make elevating module 20 during operation overall stability.
In this embodiment, specifically: the upper surface of the connecting plate 2 is provided with a spraying assembly 30, and the spraying assembly 30 comprises a spray head 31, an annular plate 32, a three-way water pipe 33, a fixing ring 34, a water supply hose 35, a water inlet pipe 36, a water storage tank 37, a water outlet pipe 38 and a water pump 39;
the upper surface welding of connecting plate 2 has annular plate 32, shower nozzle 31 is installed to annular plate 32's upper surface symmetry, water supply hose 35 is through solid fixed ring 34 fixed connection in annular plate 32's inner wall, shower nozzle 31 communicates with water supply hose 35 through tee bend water pipe 33, water pump 39 is installed to water supply hose 35's one end, water pump 39 is installed in the interior diapire of storage water tank 37, inlet tube 36 and outlet pipe 38 are installed to one side of storage water tank 37, through above setting, use water supply hose 35 can prevent that extensible component 10 or lifting unit 20 from damaging the water pipe at the during operation, water source in the storage water tank 37 passes through water pump 39 and transmits to water supply hose 35, then carry to shower nozzle 31 through tee bend water pipe 33, it is fixed with water supply hose 35 through solid fixed ring 34, during operation water supply hose 35 can not drop.
In this embodiment, specifically: a supporting assembly 401 is installed on one side of the first fixing plate 6, and the supporting assembly 401 comprises a switch group 41, a first frame 42, a second frame 43, a universal wheel 44, a pushing handle 45, a supporting rod 47, a protection plate 48, a sliding column 49 and a fixing sleeve 50;
the welding of one side of first fixed plate 6 has slip post 49, the outer wall sliding connection of slip post 49 is in the inner wall of fixed sleeve 50, fixed sleeve 50 installs in first frame 42's upper surface, the lower surface of first frame 42 welds the upper surface of second frame 43, one side welding of second frame 43 has push handle frame 45, switch block 41 is installed to one side of push handle frame 45, push handle frame 45's last surface mounting has bracing piece 47, the one end that push handle frame 45 was kept away from to bracing piece 47 articulates there is the guard plate 48, four universal wheels 44 are installed to the bottom surface symmetry of second frame 43, through above setting, make first frame 42 and second frame 43, push handle frame 45, fixed sleeve 50 is fixed into whole, the structure is more stable, this device is when carrying out maintenance work, open the water droplet that guard plate 48 can prevent the tunnel top from dripping and drench the staff.
In this embodiment, specifically: the slider 22 welds in one side of sliding column 49, and the third fixed plate 27 welds in one side of fixed sleeve 50, and through above setting, the second threaded rod 23 during operation drives sliding column 49 through slider 22 and removes, and the third fixed plate 27 is used for fixed lifting unit 20's position, makes lifting unit 20 structure more stable.
In this embodiment, specifically: connecting block 25 welds in one side of fixed sleeve 50, and first motor 7 is installed in the opposite side of slip post 49, and through above setting, connecting block 25 is used for fixing fixed column 24 and fixed sleeve 50 as an organic whole, makes lifting unit 20 during operation more stable.
In this embodiment, specifically: one end of the annular plate 32 is rotatably connected to the top of the front surface of the sliding column 49, the water storage tank 37 is mounted on the inner wall of the first frame 42, the storage battery 40 is mounted at the bottom of the water storage tank 37, through the arrangement, the annular plate 32 can rotate under the driving of the telescopic assembly 10, the water storage tank 37 is used for storing water sources, and the storage battery 40 is used for providing power.
In this embodiment, specifically: the electrical output end of the storage battery 40 is electrically connected with the electrical input end of the switch group 41 through a conducting wire, the electrical output end of the switch group 41 is electrically connected with the electrical input ends of the first motor 7, the second motor 26 and the water pump 39 through conducting wires, and the storage battery 40 is controlled by the switch group 41 to supply power to the first motor 7, the second motor 26 and the water pump 39.
When the device works, the switch group 41 controls the water pump 39 to work, the water source in the water storage tank 37 passes through the water supply hose 35 and the three-way water pipe 33, the water is sprayed to the surface of concrete to be maintained in the tunnel through the spray head 31, the protection plate 48 is rotated to the horizontal position, water drops in the tunnel can be prevented from wetting workers, the device can move forwards along the tunnel by pushing the hand pushing frame 45, after the maintenance work is finished, the switch group 41 controls the storage battery 40 to stop supplying power to the water pump 39, the spraying assembly 30 stops working, the switch group 41 controls the first motor 7 and the second motor 26 to work, the first motor 7 drives the first threaded rod 4 to rotate, the sliding plate 3 drives the connecting rod 1, the connecting rod 1 drives the connecting plate 2, and further drives the annular plates 32 to move downwards, so that the two annular plates 32 shrink inwards, and the occupied space of the device is reduced, simultaneously second motor 26 work, second motor 26 drives second threaded rod 23 and rotates, second threaded rod 23 drives slider 22, slider 22 drives slip post 49, make the spray assembly 30 at slip post 49 top wholly remove downwards, reduced the shared space of this device once more, stimulate guard plate 48 downwards, then promote hand pushing frame 45, promote this device to placing the district, because the whole occupation space of this device is little, so reduced the influence to the site operation to and the probability of potential safety hazard appears.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (8)

1. The utility model provides a concrete curing means is used in tunnel engineering construction, includes flexible subassembly (10) and lifting unit (20), its characterized in that: the telescopic assembly (10) comprises a connecting rod (1), a connecting plate (2), a sliding plate (3), a first threaded rod (4), a guide column (5) and a first motor (7);
both sides of the sliding plate (3) are rotatably connected with connecting rods (1) through pin shafts, one end, far away from the sliding plate (3), of each connecting rod (1) is rotatably connected with a connecting plate (2), one end of each first threaded rod (4) penetrates through the center of the lower surface of the sliding plate (3) and is in threaded connection with the sliding plate (3), and one end of each guide column (5) penetrates through the lower surface of the sliding plate (3) and is in sliding connection with the sliding plate (3);
the lifting assembly (20) comprises a second fixing plate (21), a sliding block (22), a second threaded rod (23), a fixing column (24), a second motor (26) and a third fixing plate (27);
one end of the second threaded rod (23) penetrates through the center of the sliding block (22) and is in threaded connection with the sliding block (22), one end of the second threaded rod (23) is rotatably connected to the lower surface of the second fixing plate (21), and the second fixing plate (21) is fixedly connected with the third fixing plate (27) through a fixing column (24).
2. The concrete curing device for tunnel engineering construction according to claim 1, characterized in that: the one end of first threaded rod (4) is rotated through the bearing and is connected with first fixed plate (6), the other end of first threaded rod (4) and the output shaft fixed connection of first motor (7), the upper surface of first fixed plate (6) and the one end fixed connection of guide post (5), one side symmetry welding of fixed column (24) has two connecting blocks (25), second motor (26) are installed in the upper surface of third fixed plate (27).
3. The concrete curing device for tunnel engineering construction according to claim 1, characterized in that: a spraying assembly (30) is mounted on the upper surface of the connecting plate (2), and the spraying assembly (30) comprises a spray head (31), an annular plate (32), a three-way water pipe (33), a fixing ring (34), a water supply hose (35), a water inlet pipe (36), a water storage tank (37), a water outlet pipe (38) and a water pump (39);
the upper surface welding of connecting plate (2) has annular slab (32), shower nozzle (31) are installed to the upper surface symmetry of annular slab (32), water supply hose (35) are through the inner wall of solid fixed ring (34) fixed connection in annular slab (32), shower nozzle (31) are through tee bend water pipe (33) and water supply hose (35) intercommunication, water pump (39) are installed to the one end of water supply hose (35), install in the inner diapire of storage water tank (37) water pump (39), inlet tube (36) and outlet pipe (38) are installed to one side of storage water tank (37).
4. The concrete curing device for tunnel engineering construction according to claim 2, characterized in that: a supporting component (401) is installed on one side of the first fixing plate (6), and the supporting component (401) comprises a switch group (41), a first frame (42), a second frame (43), universal wheels (44), a pushing handle frame (45), a supporting rod (47), a protection plate (48), a sliding column (49) and a fixing sleeve (50);
the welding of one side of first fixed plate (6) has slip post (49), the outer wall sliding connection of slip post (49) is in the inner wall of fixed sleeve (50), fixed sleeve (50) are installed in the upper surface of first frame (42), the lower surface of first frame (42) welds in the upper surface of second frame (43), the welding of one side of second frame (43) has push away hand frame (45), switch group (41) are installed to one side of push away hand frame (45), the upper surface mounting of push away hand frame (45) has bracing piece (47), the one end that push away from push away hand frame (45) in bracing piece (47) articulates there is guard plate (48), four universal wheels (44) are installed to the bottom surface symmetry of second frame (43).
5. The concrete curing device for tunnel engineering construction according to claim 1, characterized in that: the sliding block (22) is welded on one side of the sliding column (49), and the third fixing plate (27) is welded on one side of the fixing sleeve (50).
6. The concrete curing device for tunnel engineering construction according to claim 2, characterized in that: the connecting block (25) is welded on one side of the fixed sleeve (50), and the first motor (7) is installed on the other side of the sliding column (49).
7. The concrete curing device for tunnel engineering construction according to claim 3, characterized in that: one end of the annular plate (32) is rotatably connected to the top of the front surface of the sliding column (49), the water storage tank (37) is installed on the inner wall of the first frame (42), and the storage battery (40) is installed at the bottom of the water storage tank (37).
8. The concrete curing device for tunnel engineering construction according to claim 7, characterized in that: the electric output end of the storage battery (40) is electrically connected with the electric input end of the switch group (41) through a conducting wire, and the electric output end of the switch group (41) is electrically connected with the electric input ends of the first motor (7), the second motor (26) and the water pump (39) through conducting wires respectively.
CN202220501756.4U 2022-03-08 2022-03-08 Concrete curing means is used in tunnel engineering construction Expired - Fee Related CN216662905U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220501756.4U CN216662905U (en) 2022-03-08 2022-03-08 Concrete curing means is used in tunnel engineering construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220501756.4U CN216662905U (en) 2022-03-08 2022-03-08 Concrete curing means is used in tunnel engineering construction

Publications (1)

Publication Number Publication Date
CN216662905U true CN216662905U (en) 2022-06-03

Family

ID=81763777

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220501756.4U Expired - Fee Related CN216662905U (en) 2022-03-08 2022-03-08 Concrete curing means is used in tunnel engineering construction

Country Status (1)

Country Link
CN (1) CN216662905U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114941540A (en) * 2022-07-20 2022-08-26 湖南鹏翔星通汽车有限公司 Multifunctional wet spraying machine for tunnel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114941540A (en) * 2022-07-20 2022-08-26 湖南鹏翔星通汽车有限公司 Multifunctional wet spraying machine for tunnel
CN114941540B (en) * 2022-07-20 2022-11-04 湖南鹏翔星通汽车有限公司 Multifunctional wet spraying machine for tunnel

Similar Documents

Publication Publication Date Title
CN216662905U (en) Concrete curing means is used in tunnel engineering construction
CN207177922U (en) Electronic walking type tunnel form concrete health chassis
CN203523467U (en) Automatic sprinkling device
CN216864016U (en) High-rise construction concrete maintenance spray set
CN217176125U (en) Building construction safety encloses fender
JP3013768U (en) Building exterior wall washer
CN212264731U (en) Cutting device is used in steel construction processing
CN112516714A (en) Watering dust fall structure for building engineering
CN116041089B (en) Intelligent robot for concrete curing and curing method
CN219063780U (en) Boiler equipment with safety maintenance platform structure
CN219212052U (en) Welding equipment for building climbing frame
CN211274034U (en) Rotary spraying dust-settling device
CN215718792U (en) Be used for road bridge tunnel lining curing means
CN110273352A (en) A kind of watering device for highway maintenance
CN219931636U (en) Liftable cleaning machine frame for building construction
CN217232886U (en) Be used for civil engineering construction strutting arrangement convenient to remove
CN221046769U (en) Large-scale transformer station column type insulator belt cleaning device
CN214658891U (en) Concrete automatic control sprays curing means
CN213859911U (en) Precast beam yard concrete conveying device
CN218363934U (en) Automatic cleaning integration equipment that polishes of precast beam die block
CN220941996U (en) Large-scale transformer station column type insulator cleaning device
CN214319570U (en) Construction site dust device for building engineering
CN218174478U (en) Photovoltaic power plant hoist and mount construction equipment
CN216320789U (en) Environmental protection dust collecting equipment of building engineering construction
CN217678634U (en) High and large pier stud maintenance device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20220603