CN113585754A - Syllogic stagnant water screw rod convenient to loading and unloading - Google Patents
Syllogic stagnant water screw rod convenient to loading and unloading Download PDFInfo
- Publication number
- CN113585754A CN113585754A CN202110902773.9A CN202110902773A CN113585754A CN 113585754 A CN113585754 A CN 113585754A CN 202110902773 A CN202110902773 A CN 202110902773A CN 113585754 A CN113585754 A CN 113585754A
- Authority
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- China
- Prior art keywords
- wall
- block
- swing joint
- internal thread
- fixed establishment
- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 109
- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
Classifications
-
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
-
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
- E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
- E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
- E04G17/0658—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts remaining completely or partially embedded in the cast material
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a three-section type water stop screw convenient to assemble and disassemble, and relates to the technical field of water stop screws. This syllogic stagnant water screw rod convenient to loading and unloading, including fixed establishment, the position swing joint that fixed establishment's outer wall is close to the left and right sides has positioning mechanism, positioning mechanism's outer wall is kept away from fixed establishment's position swing joint and is had coupling mechanism, coupling mechanism's outer wall is through the positioning mechanism who sets up and fixed establishment's outer wall swing joint, coupling mechanism's outer wall swing joint has clamping mechanism. This syllogic stagnant water screw rod convenient to loading and unloading through the fixed establishment who sets up, can fix the device in that the wall is inside, can prevent that the wall body from leaking when practicing thrift the cost to can consolidate the wall body, improve the device's practicality, through the positioning mechanism who sets up, can further increase the device and prevent the effect that the wall body leaked, make things convenient for the device's installation and dismantlement simultaneously.
Description
Technical Field
The invention relates to the technical field of water stop screws, in particular to a three-section water stop screw convenient to assemble and disassemble.
Background
The water stop screw is a structure which is used in the construction of a basement shear wall or a civil air defense wall and plays the roles of water stop, reinforcement and control of a template. At present, the water stop screw rods used at home and abroad are mainly divided into an integral type and a three-section type. The manufacturing method comprises two modes of field self-manufacture and factory processing. The welding quality problem inevitably exists under the influence of the size of the water stop sheet and the welding process, the water stop effect is greatly influenced, the installation and the disassembly are troublesome in the use process, the water stop sheet in the cavity is easily rotated in the removal process of the clamp on the outer wall, and the water stop effect is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the three-section type water stopping screw rod convenient to assemble and disassemble, and the device is convenient to assemble and disassemble through the detachable water stopping sheet and the connecting rod, so that the working efficiency of workers is greatly improved, and the three-section type water stopping screw rod is more convenient to use.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a syllogic stagnant water screw rod convenient to loading and unloading, includes fixed establishment, the position swing joint that fixed establishment's outer wall is close to the left and right sides has positioning mechanism, positioning mechanism's outer wall is kept away from fixed establishment's position swing joint and is had coupling mechanism, coupling mechanism's outer wall is through the positioning mechanism who sets up and fixed establishment's outer wall swing joint, coupling mechanism's outer wall swing joint has clamping mechanism, clamping mechanism's outer wall is through the coupling mechanism who sets up and positioning mechanism's outer wall swing joint.
Preferably, the fixing mechanism structurally comprises a first connecting rod and a water stop sheet, the position, close to the center, of the outer wall of the first connecting rod is movably connected with the water stop sheet, and first external threads are formed in the left end and the right end of the first connecting rod.
Preferably, positioning mechanism's structure includes locating piece, first internal thread, second internal thread hole and fixed orifices, first internal thread has been seted up to the outer wall of locating piece near fixing mechanism's position, the outer wall of locating piece is kept away from first internal thread position and has been seted up second internal thread hole, the position that first internal thread outer wall is close to second internal thread hole is the equidistance and encircles the form and seted up the fixed orifices, the outer wall of locating piece is run through to the inner wall of fixed orifices.
Preferably, coupling mechanism's structure includes the external screw thread pole, connects stopper and first handle of rotating, the outer wall of external screw thread pole is kept away from positioning mechanism's position fixedly connected with and is connected the stopper, the outer wall of connecting the stopper is kept away from the first handle of rotating of position fixedly connected with of external screw thread pole, the outer wall swing joint of the outer wall of first handle of rotating through the connection stopper that sets up and external screw thread pole.
Preferably, the clamping mechanism comprises a plate abutting mechanism and a fixing bolt mechanism, the outer wall of the external thread rod is movably connected with the plate abutting mechanism, the position, close to the plate abutting mechanism, of the outer wall of the external thread rod is movably connected with the fixing bolt mechanism, and the outer wall of the fixing bolt mechanism is movably connected with the outer wall of the plate abutting mechanism through the arranged external thread rod.
Preferably, the structure of the abutting plate mechanism comprises an abutting plate block, a sleeving hole, an elastic abutting block and a spherical bag, the sleeving hole is formed in the position, close to the center, inside the abutting plate block, the elastic abutting block is fixedly connected to the outer wall of the abutting plate block, the spherical bag is movably connected to the position, close to the abutting plate block, inside the elastic abutting block, and the outer wall of the spherical bag is movably connected with the outer wall of the abutting plate block through the arranged elastic abutting block.
Preferably, the structure of the fixing bolt mechanism comprises a rotating block, a third internal thread hole, a second rotating handle and a sliding shaft, the third internal thread hole is formed in the position, close to the center, of the inner wall of the rotating block, the second rotating handle is fixedly connected to the outer wall of the rotating block, the sliding shaft is fixedly connected to the position, close to the abutting plate mechanism, of the outer wall of the rotating block, and the outer wall of the sliding shaft is movably connected with the outer wall of the abutting plate mechanism through the rotating block.
The invention provides a three-section water stop screw convenient to assemble and disassemble. The method has the following beneficial effects:
(1) this syllogic stagnant water screw rod convenient to loading and unloading through the fixed establishment who sets up, can fix the device in the wall is inside, can prevent that the wall body from leaking when practicing thrift the cost to can consolidate the wall body, improve the device's practicality.
(2) This syllogic stagnant water screw rod convenient to loading and unloading through the positioning mechanism who sets up, can further increase the device and prevent the effect that the wall body leaked, makes things convenient for the device's installation and dismantlement simultaneously to can effectually consolidate the wall body, improve the device's availability factor, improve the device's practicality simultaneously.
(3) This syllogic stagnant water screw rod convenient to loading and unloading through the coupling mechanism who sets up, can make things convenient for the device's installation and dismantlement, improves construction worker's work efficiency to reduce the wall body and use the cost of stagnant water screw rod, more facilitate the use.
(4) This syllogic stagnant water screw rod convenient to loading and unloading through the clamping mechanism who sets up, can fix the building templates to protect the building templates, prevent to cause the building templates to damage in the device use, thereby the condition that produces improvement construction cost appears.
(5) This syllogic stagnant water screw rod convenient to loading and unloading through the coupling mechanism who sets up with, the cooperation, can make the device need not use other instruments to assist and can install, further improves the installation effectiveness of the device, makes construction worker's installation convenient, and lifting efficiency more facilitates the use.
Drawings
FIG. 1 is an isometric view of the structure of the present invention;
FIG. 2 is a schematic top view of the structure of the present invention;
FIG. 3 is a cross-sectional view of the structure at A-A of the present invention;
FIG. 4 is an enlarged view of the structure at B in FIG. 3 according to the present invention.
In the figure: 1. a fixing mechanism; 11. a first connecting rod; 12. a water stop sheet; 2. a positioning mechanism; 21. positioning blocks; 22. a first internal thread; 23. a second internal thread; 24. a fixing hole; 3. a connecting mechanism; 31. an externally threaded rod; 32. a limiting block is connected; 33. a first rotating handle; 4. a clamping mechanism; 41. a plate abutting mechanism; 411. a support plate; 412. sleeving a hole; 413. an elastic resisting block; 414. a spherical balloon; 42. a fixed bolt mechanism; 421. rotating the block; 422. a third internal thread; 423. a second rotating handle; 424. a sliding shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a syllogic stagnant water screw rod convenient to loading and unloading, including fixed establishment 1, the position swing joint that the outer wall of fixed establishment 1 is close to the left and right sides has positioning mechanism 2, the position swing joint that fixed establishment 1 was kept away from to positioning mechanism 2's outer wall has coupling mechanism 3, coupling mechanism 3's outer wall is through the positioning mechanism 2 and the outer wall swing joint of fixed establishment 1 that set up, coupling mechanism 3's outer wall swing joint has clamping mechanism 4, clamping mechanism 4's outer wall is through the coupling mechanism 3 and the outer wall swing joint of positioning mechanism 2 that set up, coupling mechanism 3 and clamping mechanism 4 all set up at fixed establishment 1's both ends symmetry.
The structure of fixed establishment 1 includes head rod 11 and waterstop 12, and the position swing joint that the outer wall of head rod 11 is close to the center has waterstop 12, and first external screw thread has all been seted up at both ends about head rod 11, and the position that head rod 11 was kept away from to the outer wall of waterstop 12 is the skirt state of putting, conveniently fixes fixed establishment 1, can improve the device's waterstop simultaneously, and head rod 11 produces corresponding length according to building wall's thickness.
The connecting mechanism 3 comprises an external thread rod 31, a connecting limiting block 32 and a first rotating handle 33, the outer wall of the external thread rod 31 is far away from the position fixed connection of the positioning mechanism 2 and is provided with the connecting limiting block 32, the outer wall of the connecting limiting block 32 is far away from the position fixed connection of the external thread rod 31 and is provided with the first rotating handle 33, the outer wall of the first rotating handle 33 is movably connected with the outer wall of the external thread rod 31 through the connecting limiting block 32, the length of the connecting limiting block 32 is larger than that of the fixing bolt mechanism 42, and when the fixing bolt mechanism 42 is fixed, the fixing bolt mechanism 42 and the first rotating handle 33 are prevented from being limited mutually and the device is prevented from being difficult to detach.
The clamping mechanism 4 comprises a resisting plate mechanism 41 and a fixing bolt mechanism 42, the outer wall of the external thread rod 31 is movably connected with the resisting plate mechanism 41, the position of the outer wall of the external thread rod 31 close to the resisting plate mechanism 41 is movably connected with the fixing bolt mechanism 42, and the outer wall of the fixing bolt mechanism 42 is movably connected with the outer wall of the resisting plate mechanism 41 through the arranged external thread rod 31.
The structure of the abutting plate mechanism 41 comprises an abutting plate 411, a sleeving hole 412, an elastic abutting block 413 and a spherical bag 414, the sleeving hole 412 is formed in the position, close to the center, inside the abutting plate 411, the elastic abutting block 413 is fixedly connected to the outer wall of the abutting plate 411, the spherical bag 414 is movably connected to the position, close to the abutting plate 411, inside the elastic abutting block 413, the outer wall of the spherical bag 414 is movably connected with the outer wall of the abutting plate 411 through the arranged elastic abutting block 413, and the diameter of the inner wall of the sleeving hole 412 is larger than that of the outer wall of the external threaded rod 31.
The structure of the fixing bolt mechanism 42 includes a rotating block 421, a third internal thread hole 422, a second rotating handle 423 and a sliding shaft 424, the third internal thread hole 422 is provided at a position where the inner wall of the rotating block 421 is close to the center, the second rotating handle 423 is fixedly connected to the outer wall of the rotating block 421, the sliding shaft 424 is fixedly connected to a position where the outer wall of the rotating block 421 is close to the support plate mechanism 41, and the outer wall of the sliding shaft 424 is movably connected to the outer wall of the support plate mechanism 41 through the rotating block 421.
When the building template is required to be fixed, the positioning block 21 is fixed at the top end of the first connecting rod 11 through the first internal thread 22, then the external thread rod 31 sequentially passes through the third internal thread hole 422 and the sleeving hole 412 and then is in threaded connection with the second internal thread hole 23 through the building template, after the positioning block 21 is fixedly connected with the connecting mechanism 3, the second rotating handle 423 is rotated to enable the rotating block 421 to move along the outer wall of the external thread rod 31 to the position of the positioning mechanism 2, meanwhile, the direction of the abutting plate mechanism 41 is adjusted to enable the elastic abutting block 413 and the spherical bag 414 to be aligned with the harder position of the building template, in the process that the rotating block 421 moves to the positioning mechanism 2, the abutting block 411 moves along the direction of the external thread rod 31 to the positioning mechanism 2 through the sleeving hole 412, and the sliding shaft 424 enables the abutting plate 411 not to be influenced by the rotation of the rotating block 421, when the outer wall of the elastic abutting block 413 is close to the building template, the second rotating handle 423 is continuously rotated to gradually clamp the building template between the elastic abutting block 413 and the positioning block 21, and in the continuous clamping process, the spherical bag 414 between the building template and the elastic abutting block 413 is extruded to protect the building template and prevent the elastic abutting block 413 from extruding and crushing the building template, when the abutting block 411 touches the building template, the building template is fixed by the device to facilitate subsequent cement pouring inside the building template, the poured cement can completely wrap the outer wall of the water stop sheet 12 due to fluidity and can flow into the inside of the fixing hole 24, after the cement is solidified and formed, the first rotating handle 33 is rotated to separate the external threaded rod 31 from the inner wall of the second internal threaded hole 23, and after the first rotating handle 33 is separated from the inner wall of the second internal threaded hole 23, the building template is separated from the interior of the building template, and the building template is convenient to disassemble subsequently.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a syllogic stagnant water screw rod convenient to loading and unloading, includes fixed establishment (1), its characterized in that: the utility model discloses a clamping mechanism, including fixed establishment (1), the outer wall of fixed establishment (2) is close to the position swing joint of the left and right sides has positioning mechanism (2), the position swing joint that fixed establishment (1) was kept away from to the outer wall of positioning mechanism (2) has coupling mechanism (3), the outer wall swing joint of coupling mechanism (3) through positioning mechanism (2) that set up and fixed establishment (1), the outer wall swing joint of coupling mechanism (3) has clamping mechanism (4), the outer wall of clamping mechanism (4) is through the outer wall swing joint of coupling mechanism (3) and positioning mechanism (2) that set up.
2. The easy-to-mount/dismount three-stage water stop screw according to claim 1, wherein: the structure of the fixing mechanism (1) comprises a first connecting rod (11) and a water stop sheet (12), the position, close to the center, of the outer wall of the first connecting rod (11) is movably connected with the water stop sheet (12), and first external threads are formed in the left end and the right end of the first connecting rod (11).
3. The easy-to-mount/dismount three-stage water stop screw according to claim 1, wherein: the structure of positioning mechanism (2) includes locating piece (21), first internal thread (22), second internal thread hole (23) and fixed orifices (24), first internal thread (22) have been seted up to the position that the outer wall of locating piece (21) is close to fixed establishment (1), second internal thread hole (23) have been seted up to the position that first internal thread (22) were kept away from to the outer wall of locating piece (21), the position that the outer wall of first internal thread (22) is close to second internal thread hole (23) is the equidistance and encircles the form and seted up fixed orifices (24), the outer wall of locating piece (21) is run through to the inner wall of fixed orifices (24).
4. The easy-to-mount/dismount three-stage water stop screw according to claim 1, wherein: the structure of coupling mechanism (3) includes external screw thread pole (31), connects stopper (32) and first rotation handle (33), the second external screw thread has been seted up to the outer wall of external screw thread pole (31), the position fixedly connected with that positioning mechanism (2) were kept away from to the outer wall of external screw thread pole (31) connects stopper (32), the first rotation handle (33) of position fixedly connected with that external screw thread pole (31) were kept away from to the outer wall of connecting stopper (32), the outer wall swing joint of the connection stopper (32) of first rotation handle (33) through setting up and external screw thread pole (31).
5. The easy-to-mount/dismount three-stage water stop screw according to claim 4, wherein: the clamping mechanism (4) comprises a support plate mechanism (41) and a fixing bolt mechanism (42), the outer wall of the external thread rod (31) is movably connected with the support plate mechanism (41), the position, close to the support plate mechanism (41), of the outer wall of the external thread rod (31) is movably connected with the fixing bolt mechanism (42), and the outer wall of the fixing bolt mechanism (42) is movably connected with the outer wall of the support plate mechanism (41) through the arranged external thread rod (31).
6. The easy-to-mount/dismount three-stage water stop screw according to claim 5, wherein: the structure of the abutting plate mechanism (41) comprises an abutting plate block (411), a sleeving hole (412), an elastic abutting block (413) and a spherical bag (414), the sleeving hole (412) is formed in the position, close to the center, of the inside of the abutting plate block (411), the elastic abutting block (413) is fixedly connected to the outer wall of the abutting plate block (411), the spherical bag (414) is movably connected to the position, close to the abutting plate block (411), of the inside of the elastic abutting block (413), and the outer wall of the spherical bag (414) is movably connected with the outer wall of the abutting plate block (411) through the arranged elastic abutting block (413).
7. The easy-to-mount/dismount three-stage water stop screw according to claim 5, wherein: the structure of fixing bolt mechanism (42) includes turning block (421), third internal thread hole (422), second rotation handle (423) and slip axle (424), third internal thread hole (422) have been seted up to the inner wall of turning block (421) near the position at center, the outer wall fixedly connected with second rotation handle (423) of turning block (421), the outer wall of turning block (421) is close to the position fixedly connected with slip axle (424) of butt plate mechanism (41), the outer wall of slip axle (424) is through the turning block (421) that set up and the outer wall swing joint of butt plate mechanism (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110902773.9A CN113585754A (en) | 2021-08-06 | 2021-08-06 | Syllogic stagnant water screw rod convenient to loading and unloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110902773.9A CN113585754A (en) | 2021-08-06 | 2021-08-06 | Syllogic stagnant water screw rod convenient to loading and unloading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113585754A true CN113585754A (en) | 2021-11-02 |
Family
ID=78255880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110902773.9A Pending CN113585754A (en) | 2021-08-06 | 2021-08-06 | Syllogic stagnant water screw rod convenient to loading and unloading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113585754A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019237575A1 (en) * | 2018-06-16 | 2019-12-19 | 哈尔滨鸿盛建筑材料制造股份有限公司 | Assembled cast-in-place concrete shear wall template system |
| CN211173117U (en) * | 2019-09-19 | 2020-08-04 | 中国建筑第八工程局有限公司 | Three-section adjustable counter-pulling water-stopping screw |
| CN212078697U (en) * | 2020-01-13 | 2020-12-04 | 何昌虎 | Conveniently-assembled and disassembled water stop screw |
| CN212295660U (en) * | 2020-04-29 | 2021-01-05 | 中国建筑第二工程局有限公司 | Novel syllogic stagnant water screw rod |
| CN212453648U (en) * | 2020-05-13 | 2021-02-02 | 杭州萧宏建设环境集团有限公司 | Fastening device for steel pipe of fixed template |
| CN213573025U (en) * | 2020-09-28 | 2021-06-29 | 华川建设集团有限公司 | Water stop piece construction structure with double water stop pieces |
| CN213774517U (en) * | 2020-11-06 | 2021-07-23 | 青海省交通工程技术服务中心 | Three-section type water stop screw |
-
2021
- 2021-08-06 CN CN202110902773.9A patent/CN113585754A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019237575A1 (en) * | 2018-06-16 | 2019-12-19 | 哈尔滨鸿盛建筑材料制造股份有限公司 | Assembled cast-in-place concrete shear wall template system |
| CN211173117U (en) * | 2019-09-19 | 2020-08-04 | 中国建筑第八工程局有限公司 | Three-section adjustable counter-pulling water-stopping screw |
| CN212078697U (en) * | 2020-01-13 | 2020-12-04 | 何昌虎 | Conveniently-assembled and disassembled water stop screw |
| CN212295660U (en) * | 2020-04-29 | 2021-01-05 | 中国建筑第二工程局有限公司 | Novel syllogic stagnant water screw rod |
| CN212453648U (en) * | 2020-05-13 | 2021-02-02 | 杭州萧宏建设环境集团有限公司 | Fastening device for steel pipe of fixed template |
| CN213573025U (en) * | 2020-09-28 | 2021-06-29 | 华川建设集团有限公司 | Water stop piece construction structure with double water stop pieces |
| CN213774517U (en) * | 2020-11-06 | 2021-07-23 | 青海省交通工程技术服务中心 | Three-section type water stop screw |
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Application publication date: 20211102 |