CN112727103B - Building construction concrete vibrator - Google Patents
Building construction concrete vibrator Download PDFInfo
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- CN112727103B CN112727103B CN202011588111.0A CN202011588111A CN112727103B CN 112727103 B CN112727103 B CN 112727103B CN 202011588111 A CN202011588111 A CN 202011588111A CN 112727103 B CN112727103 B CN 112727103B
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- 238000009435 building construction Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 73
- 238000012546 transfer Methods 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 238000010276 construction Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 239000012634 fragment Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
- E04G21/08—Internal vibrators, e.g. needle vibrators
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention provides a concrete vibrator for building construction, which relates to the technical field of building construction and solves the problems that the prior vibrator has single vibration mode and continuous and consistent vibration direction in the practical application process, further causes fatigue of concrete, further reduces the service life of a concrete building, and cannot vibrate the concrete building in multiple directions simultaneously, so that the working efficiency is low, the concrete vibrator comprises a driving mechanism which is arranged at the top end position of a bearing mechanism, in the invention, the reciprocating positive and negative rotation operation of a driving gear is realized through the rotary connection of a transfer lever A and a transfer lever B, a driven bevel gear is driven to be meshed with the driven bevel gear through the positive and negative rotation operation of the driving gear, so that a side impact box is further driven to perform reciprocating rotation operation through a guide shaft in a side impact mechanism, and the force transmission ball is arranged in the side impact box, so that the impact degree to the shell can be increased to realize the reciprocating side impact operation to the concrete.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a concrete vibrator for building construction.
Background
The building construction refers to the production activity in the construction implementation stage of engineering construction, is the construction process of various buildings, also can be said to change various lines on the design drawing into a real object in the designated place, and it includes foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction, etc., the place of construction operation is called "construction site" or "construction site", also called as construction site, on the other hand, when the concrete mixed by concrete mixer is used to pour the component, the air bubble must be removed and tamped, so that the concrete is tightly combined, the phenomenon of honeycomb pitted surface of the concrete is eliminated, so as to improve the strength and ensure the quality of the concrete component, the process of eliminating the air bubble and tamping the concrete is the concrete vibration,
for example, application No.: the invention relates to the field of building construction auxiliary equipment, and discloses a building construction concrete vibrator which comprises a vibrating pipe, a driving motor, an outer hose and an inner hose, wherein the inner hose is movably sleeved inside the outer hose, the outer surface of the outer hose is not in contact with the inner surface of the inner hose, and one end of the outer hose is communicated with an intermittent oil pressing mechanism. This construction concrete vibrator, the intraductal first shell fragment and the second shell fragment that has set up a plurality of staggered arrangement that vibrate, utilize intermittent type nature oiling mode to make incessant inside and outside bounce of first shell fragment and second shell fragment, make the pipe that vibrates wholly continuously vibrate, so that utilize the pipe that vibrates to vibrate to the concrete processing, compare in current vibrator, vibration frequency is lower, effectively reduce the phenomenon of concrete bleeding or grit layering that arouses easily because of high frequency vibrates, thereby satisfy the later stage performance influence minimizing after pouring under the concrete existing state.
Based on the search of above-mentioned patent to and combine the equipment discovery among the prior art, above-mentioned equipment when using, though can carry out the vibration through the shell fragment, nevertheless there is in the practical application in-process because of the mode of vibration comparatively single and the direction of vibration is lasting unanimous, and then can cause the concrete to produce the fatigue nature, and then can reduce concrete building's life, moreover can't vibrate a plurality of directions of concrete building simultaneously, consequently there is work efficiency low.
Disclosure of Invention
In order to solve the technical problems, the invention provides a concrete vibrator for building construction, which aims to solve the problems that the existing vibrator has fatigue property and further reduces the service life of a concrete building due to the fact that the vibration mode is single and the vibration directions are consistent continuously in the actual application process, and the working efficiency is low because the existing vibrator cannot vibrate the concrete building in multiple directions at the same time.
The invention relates to a concrete vibrator for building construction, which is achieved by the following specific technical means:
a building construction concrete vibrator comprises a driving mechanism, a reciprocating mechanism and a side impact mechanism, wherein the driving mechanism is arranged at the top end of a bearing mechanism, and the left side and the right side of the driving mechanism are both provided with a hammering mechanism; the two hammering plates are respectively connected to the front side and the rear side of the interior of the shell in a sliding manner; the reciprocating mechanism is arranged at the lower end of the driving mechanism; the side impact mechanism is arranged at the bottom end of the reciprocating mechanism and is positioned in the bearing mechanism; the side-impact mechanism comprises a guide shaft, a sleeve, a side-impact box and a force transmission ball, the sleeve is sleeved on the outer side of the guide shaft, the bottom end of the sleeve is fixedly connected with the side-impact box, a slide way is arranged in the side-impact box, the force transmission ball is connected in the side-impact box in a sliding mode, and the guide shaft is fixedly connected to the bottom end of the driven gear in an installation state.
Furthermore, the bearing mechanism comprises a shell, a hammering plate, a hammering device and a transmission plate, wherein the hammering plate is provided with two parts, the bottom ends of the two hammering plates are respectively provided with the hammering device, the front side and the rear side of the peripheral surface of the transmission plate are respectively provided with a square plate, and the transmission plate is connected with the hammering device through the square plates;
furthermore, the driving mechanism comprises a motor and a driving bevel gear, the driving bevel gear is mounted at the bottom end of the motor, and the motor is screwed on the top end face of the shell through a bolt;
furthermore, the driving mechanism comprises driven bevel gears and transfer shafts, the driven bevel gears are provided with two positions, the two driven bevel gears are respectively meshed and driven at the left side and the right side of the bottom end of the driving bevel gear, the transfer shafts are respectively arranged at the outer sides of the two driven bevel gears, and the rotating directions of the two driven bevel gears and the driving bevel gears are opposite when the two driven bevel gears and the driving bevel gears are meshed and driven in the installation state;
furthermore, the reciprocating mechanism comprises a transmission rod and a transfer rod A, the left side of the bottom end of the transmission rod is connected with the transfer rod A through a rotating shaft, and the transfer rod A is arranged on the outer side surface of the output shaft of the motor;
furthermore, the reciprocating mechanism also comprises a transfer rod B, a driving gear and a driven gear, wherein the transfer rod B is connected to the position right below the transfer rod A in a shaft connection mode, the length of the transfer rod B is smaller than that of the transfer rod A, the driving gear is connected to the position right below the transfer rod B in a rotating mode, the driven gear is meshed and driven on the right side of the driving gear, and the driving gear and the driven gear are opposite in rotating direction in the installation state;
further, hammering mechanism is including positioning disk, connecting rod A, connecting rod B and hammer, the elliptical trough has been seted up to the front end of positioning disk, and the front end of positioning disk rotates and is connected with connecting rod A to still rotate at connecting rod A's front end and be connected with connecting rod B, hammer fixed connection is in connecting rod B's bottom position.
Compared with the prior art, the invention has the following beneficial effects:
in the invention, a transmission shaft is arranged at the output end of the bottom side of a motor, a driving bevel gear is arranged on the outer side surface of the transmission shaft, driven bevel gears are arranged at the left end and the right end of the bottom side of the driving bevel gear, so that a transmission rod in a reciprocating mechanism can be synchronously driven to rotate when the driving bevel gear rotates, reciprocating forward and backward rotation operation on a driving gear is further realized through the rotary connection of a transfer rod A and a transfer rod B, the driven gear is driven to be meshed with the driven gear through the forward and backward rotation operation of the driving gear, so that a side impact box is further driven to carry out reciprocating rotation operation through a guide shaft in the side impact mechanism, and a force transmission ball is arranged in the side impact box, so that the reciprocating side impact operation on concrete can be realized through the impact degree on a shell, on the other hand, a connecting rod A drives a connecting rod B to drive a hammering hammer to carry out reciprocating hammering operation on a hammering plate through a connecting rod A, and then carry out the hammering operation to the concrete on transmitting the driving plate with the hammering power through the hammering ware, this design can realize the inside all-round operation of vibrating of concrete building to reach the purpose that improves work efficiency.
Drawings
Fig. 1 is a right side view schematically showing the structure of the present invention in a half-section state.
Fig. 2 is a left side view schematically showing the structure of the present invention in a half-section state.
Fig. 3 is a schematic bottom side view of the present invention in a half-section state.
Fig. 4 is an axial view of the present invention in a half-section state.
Fig. 5 is an enlarged schematic view of the structure at a in fig. 1 according to the present invention.
Fig. 6 is an enlarged schematic view of the invention at B in fig. 2.
Fig. 7 is an enlarged view of the structure of fig. 3 at C according to the present invention.
Fig. 8 is an enlarged view of the structure of fig. 4D according to the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a carrying mechanism; 101. a housing; 102. hammering the plate; 103. a hammer; 104. a drive plate; 2. a drive mechanism; 201. a motor; 202. a drive bevel gear; 203. a driven bevel gear; 204. a branch shaft; 3. a reciprocating mechanism; 301. a transmission rod; 302. a tap lever A; 303. a tap lever B; 304. a drive gear; 305. a driven gear; 4. a hammering mechanism; 401. a guide plate; 402. a connecting rod A; 403. a connecting rod B; 404. hammering; 5. a side impact mechanism; 501. a guide shaft; 502. a sleeve; 503. side impact box; 504. force transmission ball.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in figures 1 to 8:
the invention provides a concrete vibrator for building construction, which comprises: the device comprises a driving mechanism 2, a reciprocating mechanism 3 and a side impact mechanism 5, wherein the driving mechanism 2 is arranged at the top end of a bearing mechanism 1, and the left side and the right side of the driving mechanism 2 are both provided with a hammering mechanism 4; the reciprocating mechanism 3 is arranged at the lower end position of the driving mechanism 2; the driving mechanism 2 comprises a motor 201 and a driving bevel gear 202, the driving bevel gear 202 is installed at the bottom end of the motor 201, and the motor 201 is screwed on the top end face of the shell 101 through a bolt; the side impact mechanism 5 is arranged at the bottom end position of the reciprocating mechanism 3 and is positioned inside the bearing mechanism 1; the side impact mechanism 5 comprises a guide shaft 501, a sleeve 502, a side impact box 503 and a force transmission ball 504, wherein the sleeve 502 is sleeved outside the guide shaft 501, the bottom end of the sleeve 502 is fixedly connected with the side impact box 503, a slide way is arranged inside the side impact box 503, the force transmission ball 504 is connected inside the side impact box 503 in a sliding manner, and the guide shaft 501 is fixedly connected to the bottom end of the driven gear 305 in an installation state.
The bearing mechanism 1 comprises a shell 101, a hammering plate 102, a hammering device 103 and a transmission plate 104, wherein the hammering plate 102 is provided with two positions, the hammering devices 103 are arranged at the bottom ends of the two hammering plates 102, and the two hammering plates 102 are respectively connected to the front side and the rear side of the inside of the shell 101 in a sliding manner; square plates are mounted on the front side and the rear side of the peripheral surface of the transmission plate 104, and are connected with the hammer 103 through the square plates.
The driving mechanism 2 comprises a driven bevel gear 203 and a transfer shaft 204, the driven bevel gear 203 is provided with two positions, the two driven bevel gears 203 are respectively meshed and driven at the left side and the right side of the bottom end of the driving bevel gear 202, the transfer shaft 204 is arranged on the outer sides of the two driven bevel gears 203, and the rotating directions of the two driven bevel gears 203 and the driving bevel gear 202 are opposite when the two driven bevel gears 203 and the driving bevel gear 202 are meshed and driven in the mounting state.
The reciprocating mechanism 3 comprises a transmission rod 301 and a transfer lever A302, the left side of the bottom end of the transmission rod 301 is connected with the transfer lever A302 through a rotating shaft, and the transfer lever A302 is arranged on the outer side surface of the output shaft of the motor 201.
The reciprocating mechanism 3 further comprises a transfer lever B303, a driving gear 304 and a driven gear 305, the transfer lever B303 is connected to the position right below the transfer lever A302 in a shaft mode, the length of the transfer lever B303 is smaller than that of the transfer lever A302, the driving gear 304 is connected to the position right below the transfer lever B303 in a rotating mode, the driven gear 305 is meshed and driven on the right side of the driving gear 304, and the driving gear 304 and the driven gear 305 are opposite in rotating direction in the installation state.
Wherein, hammering mechanism 4 is including positioning disk 401, connecting rod A402, connecting rod B403 and hammer 404, the elliptical trough has been seted up to positioning disk 401's front end, and positioning disk 401's front end rotates and is connected with connecting rod A402, and still rotate at connecting rod A402's front end and be connected with connecting rod B403, hammer 404 fixed connection is in the bottom position of connecting rod B403, drive connecting rod B403 through connecting rod A402 and drive hammer 404 and carry out reciprocal hammering operation to hammering board 102, and then carry out hammering operation to the concrete on the driving plate 104 with hammering power conduction through hammering ware 103, this design can realize the inside all-round vibration operation of concrete building, in order to reach the mesh that improves work efficiency.
When in use: firstly, filling the shell 101 and the inner main body in the bearing mechanism 1 into a gap of concrete, then starting the motor 201 in the driving mechanism 2, installing a transmission shaft at the output end of the bottom side of the motor 201, installing a driving bevel gear 202 on the outer side surface of the transmission shaft, installing driven bevel gears 203 at the left and right ends of the bottom side of the driving bevel gear 202, so that when the driving bevel gear 202 rotates, the driving rod 301 in the reciprocating mechanism 3 can be synchronously driven to rotate, further, the reciprocating forward and reverse rotation operation of the driving gear 304 is realized through the rotary connection of the transfer lever A302 and the transfer lever B303, the driven gear 305 is driven to be meshed with the driving gear 304 through the forward and reverse rotation operation of the driving gear 304, further, the side impact box 503 is driven to perform reciprocating rotation operation through the guide shaft 501 in the side impact mechanism 5, and a force transmission ball 504 is installed inside the side impact box 503, therefore, the impact degree to the shell 101 can be increased to realize the reciprocating side impact operation to the concrete;
on the other hand, when the driven bevel gear 203 rotates through the meshing transmission with the driving bevel gear 202, the connecting rod a402 installed on the right side of the guide disc 401 in the hammering mechanism 4 can be synchronously rotated through the moving rod 204 along the elliptical groove formed in the right end of the guide disc 401, then the connecting rod a402 drives the connecting rod B403 to drive the hammer 404 to perform reciprocating hammering operation on the hammering plate 102, and then the hammering force is transmitted to the transmission plate 104 through the hammer 103 to perform hammering operation on concrete.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (5)
1. The utility model provides a construction concrete vibrator which characterized in that: the hammer is characterized by comprising a driving mechanism (2), a reciprocating mechanism (3) and a side-striking mechanism (5), wherein the driving mechanism (2) is arranged at the top end of a bearing mechanism (1), and hammering mechanisms (4) are arranged on the left side and the right side of the driving mechanism (2); the reciprocating mechanism (3) is arranged at the lower end of the driving mechanism (2); the side impact mechanism (5) is arranged at the bottom end of the reciprocating mechanism (3) and is positioned in the bearing mechanism (1); the side impact mechanism (5) comprises a guide shaft (501), a sleeve (502), a side impact box (503) and a force transmission ball (504), the sleeve (502) is sleeved on the outer side of the guide shaft (501), the bottom end of the sleeve (502) is fixedly connected with the side impact box (503), a slide way is arranged in the side impact box (503), and the force transmission ball (504) is connected in the side impact box in a sliding manner;
the reciprocating mechanism (3) comprises a transmission rod (301) and a transfer rod A (302), the left side of the bottom end of the transmission rod (301) is connected with the transfer rod A (302) through a rotating shaft, and the transfer rod A (302) is arranged on the outer side surface of an output shaft of the motor (201);
the reciprocating mechanism (3) further comprises a transfer rod B (303), a driving gear (304) and a driven gear (305), the transfer rod B (303) is connected to the position right below the transfer rod A (302) in a shaft-connecting mode, the length of the transfer rod B (303) is smaller than that of the transfer rod A (302), the driving gear (304) is connected to the position right below the transfer rod B (303) in a rotating mode, the driven gear (305) is in meshing transmission on the right side of the driving gear (304), and the driving gear (304) and the driven gear (305) are opposite in rotating direction in the installation state;
the guide shaft (501) is fixedly connected to the bottom end position of the driven gear (305) in the mounting state.
2. The building construction concrete vibrator as claimed in claim 1, wherein: the bearing mechanism (1) comprises a shell (101), a hammering plate (102), a hammering device (103) and a transmission plate (104), the hammering plate (102) is provided with two positions, the hammering devices (103) are arranged at the bottom ends of the two hammering plates (102), and the two hammering plates (102) are respectively connected to the front side and the rear side of the inside of the shell (101) in a sliding mode; square plates are arranged on the front side and the rear side of the peripheral face of the transmission plate (104) and are connected with the hammering device (103) through the square plates.
3. The building construction concrete vibrator as claimed in claim 1, wherein: the driving mechanism (2) comprises a motor (201) and a driving bevel gear (202), the driving bevel gear (202) is installed at the bottom end of the motor (201), and the motor (201) is screwed on the top end face of the shell (101) through a bolt.
4. The building construction concrete vibrator as claimed in claim 3, wherein: the driving mechanism (2) comprises driven bevel gears (203) and transfer shafts (204), the driven bevel gears (203) are arranged at two positions, the driven bevel gears (203) at the two positions are respectively meshed and driven at the left side and the right side of the bottom end of the driving bevel gear (202), the transfer shafts (204) are arranged on the outer sides of the driven bevel gears (203) at the two positions, and the rotating directions of the driven bevel gears (203) at the two positions are opposite to the rotating directions of the driven bevel gears (202) during meshing and driving in the installation state.
5. The building construction concrete vibrator as claimed in claim 1, wherein: hammering mechanism (4) are including positioning disk (401), connecting rod A (402), connecting rod B (403) and hammer (404), the elliptical trough has been seted up to the front end of positioning disk (401), and the front end of positioning disk (401) rotates and is connected with connecting rod A (402) to still rotate at the front end of connecting rod A (402) and be connected with connecting rod B (403), hammer (404) fixed connection is in the bottom position of connecting rod B (403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011588111.0A CN112727103B (en) | 2020-12-28 | 2020-12-28 | Building construction concrete vibrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011588111.0A CN112727103B (en) | 2020-12-28 | 2020-12-28 | Building construction concrete vibrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112727103A CN112727103A (en) | 2021-04-30 |
| CN112727103B true CN112727103B (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011588111.0A Expired - Fee Related CN112727103B (en) | 2020-12-28 | 2020-12-28 | Building construction concrete vibrator |
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| Country | Link |
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| CN (1) | CN112727103B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113653330A (en) * | 2021-08-17 | 2021-11-16 | 徐萍萍 | Plug-in concrete vibrator for industrial park construction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202831028U (en) * | 2012-09-28 | 2013-03-27 | 张桂添 | Multifunctional vibration hammer |
| CN207092558U (en) * | 2017-08-01 | 2018-03-13 | 湖南省第六工程有限公司 | One kind holds rechargeable cement vibrator |
| CN109138438A (en) * | 2018-09-18 | 2019-01-04 | 常熟虞星光电科技有限公司 | A kind of small-sized vibrator that construction aspect uses |
| CN211621244U (en) * | 2020-01-05 | 2020-10-02 | 温州交通建设集团有限公司 | Concrete vibrating equipment for pier stud of plate bridge |
| CN111927102A (en) * | 2020-09-21 | 2020-11-13 | 烟台怡海网络科技有限公司 | Building construction concrete vibrator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7278777B2 (en) * | 2004-06-10 | 2007-10-09 | Elsten Stanley E | Hand held concrete vibrator |
-
2020
- 2020-12-28 CN CN202011588111.0A patent/CN112727103B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202831028U (en) * | 2012-09-28 | 2013-03-27 | 张桂添 | Multifunctional vibration hammer |
| CN207092558U (en) * | 2017-08-01 | 2018-03-13 | 湖南省第六工程有限公司 | One kind holds rechargeable cement vibrator |
| CN109138438A (en) * | 2018-09-18 | 2019-01-04 | 常熟虞星光电科技有限公司 | A kind of small-sized vibrator that construction aspect uses |
| CN211621244U (en) * | 2020-01-05 | 2020-10-02 | 温州交通建设集团有限公司 | Concrete vibrating equipment for pier stud of plate bridge |
| CN111927102A (en) * | 2020-09-21 | 2020-11-13 | 烟台怡海网络科技有限公司 | Building construction concrete vibrator |
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| CN112727103A (en) | 2021-04-30 |
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Granted publication date: 20220412 |