CN211173117U - Three-section adjustable counter-pulling water-stopping screw - Google Patents
Three-section adjustable counter-pulling water-stopping screw Download PDFInfo
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- CN211173117U CN211173117U CN201921558080.7U CN201921558080U CN211173117U CN 211173117 U CN211173117 U CN 211173117U CN 201921558080 U CN201921558080 U CN 201921558080U CN 211173117 U CN211173117 U CN 211173117U
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Abstract
The utility model discloses a three-section adjustable counter-pulling water stop screw, which comprises a first middle screw (5), a second middle screw (7), an extension column (8), a slide bar groove (12), a slide groove (18), a telescopic column (20), a slide column (21) and a slide bar (22); the first middle screw is connected with the first sleeve, the pair of sliding rod grooves are formed in the first middle screw, and the pair of sliding grooves are formed in the first middle screw and communicated with the sliding rod grooves; the second middle screw rod, the extension column and the telescopic column are sequentially fixed and connected with the second sleeve, the pair of sliding columns are arranged on the telescopic column, and the pair of sliding rods are arranged on the sliding columns; the extension column is coaxially inserted into the first middle screw rod and slides relatively, so that the pair of sliding rods can respectively slide along the pair of sliding grooves and are clamped and positioned with the pair of sliding rod grooves. The utility model discloses can play effectual fixed die plate, prevent to explode the effect of mould and stagnant water when concrete wall or post are pour.
Description
Technical Field
The utility model relates to a to drawing the screw rod, especially relate to a three-section adjustable to drawing stagnant water screw rod.
Background
The split screw is used for fixing the concrete wall, and when a basement or the concrete wall with a waterproof requirement is fixedly constructed, the split screw does not have a waterproof effect, so that the split water stop bolt with the annular water stop sheet in the middle needs to be used.
The three-section type counter-pulling water-stopping screw rod in the prior art mainly comprises a first screw rod, a second screw rod, a middle sleeve for connecting the first screw rod and the second screw rod, a water-stopping ring arranged on the middle sleeve, plugs arranged on the first screw rod and the second screw rod and a fixing plate fixed through nuts. The three-section type counter-pulling water-stopping screw rod in the prior art has certain disadvantages when in use:
1. when the counter-pulling water-stopping screw rod in the prior art is used, the counter-pulling water-stopping screw rods with different sizes need to be selected according to the width of a wall body, so that the counter-pulling water-stopping screw rod is inconvenient to use and has large limitation.
2. The sealing ring of the counter-pulling water-stopping screw rod in the prior art is fixed in the middle of the screw rod, or can slide in the middle of the screw rod but cannot be fixed, so that the counter-pulling water-stopping screw rod is inconvenient to take and place, and the concrete wall or the concrete column is easy to seep water when being poured.
3. When concrete is poured, the situation that the blocking blocks at the joints of the middle screw rods and the two end screw rods are easy to loosen is caused, so that the positions where the blocking blocks are placed are deviated, and certain trouble is brought to subsequent disassembly.
Disclosure of Invention
An object of the utility model is to drawing stagnant water screw rod with adjustable three-section can play effectual fixed die plate, prevent the effect of exploding mould and stagnant water when concrete wall or post are pour.
The utility model discloses a realize like this:
a three-section adjustable counter-pulling water stop screw comprises a first screw, a fastening thread, a fixing plate, a fastening nut, a first sleeve, a blocking block, a second screw, a water stop ring and a second sleeve; the two ends of the first screw rod and the second screw rod are respectively provided with a fastening thread, and the outer side ends of the first screw rod and the second screw rod are respectively connected with the fixing plate through the fastening threads and are fixed through fastening nuts; the inner side end of the first screw rod is connected with the first sleeve through a fastening thread, the inner side end of the second screw rod is connected with the second sleeve through a fastening thread, the outer side ends of the first sleeve and the second sleeve are both provided with a plugging block, and the water stop ring is arranged on the second sleeve;
the three-section adjustable counter-pulling water-stopping screw rod further comprises a first middle screw rod, a second middle screw rod, an extension column, a sliding rod groove, a sliding groove, a telescopic column, a sliding column and a sliding rod; the first middle screw rod is coaxially fixed at the inner side end of the first sleeve, the pair of slide bar grooves are symmetrically arranged on the first middle screw rod, and the pair of slide bar grooves are symmetrically arranged on the inner wall of the first middle screw rod and are respectively and correspondingly communicated with the pair of slide bar grooves; the inner side end of the second middle screw rod, the extension column and the telescopic column are sequentially and coaxially fixed, the outer side end of the second middle screw rod is coaxially fixed at the inner side end of the second sleeve, the pair of sliding columns are symmetrically arranged on the telescopic column, and the pair of sliding rods are respectively and correspondingly arranged on the pair of sliding columns; the extension column is coaxially inserted into the first middle screw rod and slides relatively, so that the pair of sliding rods can respectively slide along the pair of sliding grooves and are correspondingly clamped and positioned with the pair of sliding rod grooves, and the first middle screw rod is fixedly connected with the second middle screw rod.
The sliding column is internally provided with a cavity, and the sliding rod is inserted into the cavity of the sliding column through a spring and bounces along the axial direction of the sliding column, so that the sliding rod can be tightly propped in the sliding groove and the sliding rod groove.
The first middle screw rod on be equipped with the fixed orifices, extend and be equipped with the fixed slot on the post, when extending post and the coaxial grafting of first middle screw rod and relative slip, the fixed orifices can be fixed with the fixed slot centering and through the embedding of fixed stopper, screw rod fixed connection in the middle of messenger's first middle screw rod and second.
The outer walls of the first sleeve and the second sleeve are fixedly provided with an annular sleeve edge and an arc-shaped sleeve edge, the annular sleeve edge and the arc-shaped sleeve edge are coaxially arranged at intervals, and the water stop ring is arranged on the second sleeve and is positioned between the annular sleeve edge and the arc-shaped sleeve edge.
The thickness of the water stop ring is equal to the distance between the annular sleeve edge and the arc sleeve edge, so that the annular sleeve edge and the arc sleeve edge are attached to two surfaces of the water stop ring.
The outer walls of the first sleeve and the second sleeve are sleeved with fixed sleeve edges through anti-slip pads, and the first sleeve and the second sleeve are fixedly connected with the blocking piece through the fixed sleeve edges respectively.
The anti-slip mat is symmetrically provided with a pair of limiting blocks, the inner wall of the fixed sleeve edge is symmetrically provided with a pair of limiting grooves, and the pair of limiting blocks are respectively matched and clamped in the pair of limiting grooves, so that the anti-slip mat is fixedly connected with the fixed sleeve edge.
Compared with the prior art, the utility model, following beneficial effect has:
1. the utility model discloses owing to set up slide bar groove and slide bar, can carry out length adjustment to the intermediate part of burying in the wall body to drawing the water screw rod to satisfy the needs of different width wall bodies, through screw rod in the middle of tensile second, make the slide bar slide in the slide bar, under the spring action of spring, the slide bar passes through the slide bar and fixes the inside at the slide bar groove, make screw rod fixed in the middle of first middle screw rod and the second, thereby accomplish the length adjustment to drawing the water screw rod.
2. The utility model discloses owing to set up annular cover limit and arc cover limit, can play spacing effect to the seal ring, conveniently install fixedly, through at the horizontal direction pulling seal ring for the seal ring passes through arc cover limit and fixes between annular cover limit and arc cover limit, thereby accomplishes the fixed to the seal ring.
3. The utility model discloses owing to set up slipmat and stopper, have better anti-skidding effect, can play fixed effect to the sprue, avoid the sprue to appear not hard up the condition with the junction of screw rod to be convenient for dismantle, the stopper cooperation on spacing groove on the fixed cover limit and the slipmat plays the effect of further fixed sprue, thereby realizes avoiding positional deviation to the stability of sprue.
The utility model can adjust the length of the middle part of the counter-pulling water screw rod embedded in the wall body by arranging the slide rod groove and the slide rod, so as to meet the requirements of wall bodies with different widths; meanwhile, the annular sleeve edge and the arc sleeve edge are arranged, so that the water stop ring can be limited, and the water stop ring is convenient to mount and fix; in addition, through setting up slipmat and stopper, can play fixed effect to the sprue, avoid the sprue to appear not hard up the condition with the junction of screw to be convenient for dismantle, have better use prospect.
Drawings
FIG. 1 is a schematic structural view of a three-section adjustable counter-pulling water-stop screw of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a perspective view of the first screw of the three-section adjustable counter-pulling water stop screw of the present invention;
FIG. 4 is a sectional view of the first middle screw of the three-section adjustable counter-pulling water-stop screw of the present invention;
FIG. 5 is a perspective view of a second middle screw of the three-section adjustable counter-pulling water-stop screw of the present invention;
FIG. 6 is an exploded view of the three-section adjustable sliding post in the split water stop screw of the present invention;
fig. 7 is a partially enlarged view of the first sleeve in the three-section adjustable counter-pulling water-stop screw of the present invention.
In the figure, 1 a first screw rod, 2 fastening threads, 3 a fixing plate, 4 fastening nuts, 5 a first intermediate screw rod, 6 a first sleeve, 7 a second intermediate screw rod, 8 an extension column, 9 a blocking block, 10 a second screw rod, 11 a water stop ring, 12 a sliding rod groove, 13 an annular sleeve edge, 14 an arc sleeve edge, 15 internal threads, 16 a fixing plug, 17 a fixing groove, 18 a sliding groove, 19 a fixing hole, 20 a telescopic column, 21 a sliding column, 22 a sliding rod, 23 a spring, 24 a fixing sleeve edge, 25 a limiting groove, 26 a non-slip mat, 27 a limiting block and 28 a second sleeve.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 1 and fig. 3, a three-segment adjustable counter-pulling water-stopping screw comprises a first screw 1, a fastening thread 2, a fixing plate 3, a fastening nut 4, a first sleeve 6, a blocking block 9, a second screw 10, a water-stopping ring 11 and a second sleeve 28; the two ends of the first screw rod 1 and the second screw rod 10 are both provided with fastening threads 2, and the outer side ends of the first screw rod 1 and the second screw rod 10 are both connected with a fixing plate 3 through the fastening threads 2 and are fixed through fastening nuts 4; the medial extremity of first screw rod 1 passes through fastening screw 2 and connects first sleeve 6, and the medial extremity of second screw rod 10 passes through fastening screw 2 and connects second sleeve 28, and all is equipped with internal thread 15 on the inner wall of first sleeve 6 and second sleeve 28, and the outside end of first sleeve 6 and second sleeve 28 all is equipped with sprue 9, and seal ring 11 sets up on second sleeve 28.
Referring to fig. 1, fig. 2 and fig. 5, the three-segment adjustable counter-pulling water-stopping screw further includes a first middle screw 5, a second middle screw 7, an extension column 8, a slide bar groove 12, a slide groove 18, a telescopic column 20, a slide column 21 and a slide bar 22; the first middle screw rod 5 is coaxially fixed at the inner side end of the first sleeve 6, the pair of sliding rod grooves 12 are symmetrically arranged on the first middle screw rod 5, and the pair of sliding grooves 18 are symmetrically arranged on the inner wall of the first middle screw rod 5 and are respectively and correspondingly communicated with the pair of sliding rod grooves 12; the inner side end of the second middle screw 7, the extension column 8 and the telescopic column 20 are sequentially and coaxially fixed, the outer side end of the second middle screw 7 is coaxially fixed at the inner side end of the second sleeve 28, the pair of sliding columns 21 are symmetrically arranged on the telescopic column 20, and the pair of sliding rods 22 are respectively and correspondingly arranged on the pair of sliding columns 21; the extending column 8 is coaxially inserted into the first middle screw rod 5 and slides relatively, so that the pair of sliding rods 22 can respectively slide along the pair of sliding grooves 18 and are clamped and positioned corresponding to the pair of sliding rod grooves 12, and the first middle screw rod 5 is fixedly connected with the second middle screw rod 7.
Referring to fig. 6, a cavity is formed in the sliding column 21, the sliding rod 22 is inserted into the cavity of the sliding column 21 through a spring 23 and is sprung along the axial direction of the sliding column 21, so that the sliding rod 22 can be pressed against the sliding groove 18 and the sliding rod groove 12, and under the action of the elastic force of the spring 23, the sliding rod 22 passes through the sliding groove 18 and is fixed in the sliding rod groove 12, so as to lock the first middle screw 5 and the second middle screw 7, thereby adjusting the length of the middle part of the water-pulling screw buried in the wall, and meeting the construction requirements of walls with different widths.
Referring to fig. 2 and fig. 4, a fixing hole 19 is formed in one side of the first middle screw 5, a fixing groove 17 is formed in the extending column 8, and when the extending column 8 and the first middle screw 5 are coaxially inserted and slide relative to each other, the fixing hole 19 can be aligned with the fixing groove 17 and embedded and fixed through a fixing plug 16, so that the first middle screw 5 and the second middle screw 7 are fixedly connected. Preferably, the fixing plug 16 is matched with the fixing hole 19 and the fixing groove 17 in size, so that it can be plugged into the fixing hole 19 and the fixing groove 17, thereby fixedly connecting the extension column 8 with the first middle screw 5.
Referring to fig. 1 and fig. 2, the outer walls of the first sleeve 6 and the second sleeve 28 are both fixedly provided with an annular sleeve edge 13 and an arc-shaped sleeve edge 14, the annular sleeve edge 13 and the arc-shaped sleeve edge 14 are coaxially arranged at intervals, and the water stop ring 11 is arranged on the second sleeve 28 and is located between the annular sleeve edge 13 and the arc-shaped sleeve edge 14. Through the axial pulling sealing ring 11 along the counter-pulling sealing screw rod for sealing ring 11 is fixed between annular sleeve edge 13 and arc sleeve edge 14 through arc sleeve edge 14 after, thereby accomplishes the fixed to sealing ring 11, avoids sealing ring 11 to appear sliding, and it is more convenient to use.
Preferably, the thickness of the water stop ring 11 is equal to the distance between the annular sleeve edge 13 and the arc sleeve edge 14, so that the annular sleeve edge 13 and the arc sleeve edge 14 are attached to two surfaces of the water stop ring 11, a good water stop effect is achieved, the sliding of the water stop ring 11 can be limited, and the water stop ring 11 is convenient to install and fix.
Referring to fig. 7, the outer walls of the first sleeve 6 and the second sleeve 28 are sleeved with a fixed sleeve edge 24 through an anti-slip pad 26, the first sleeve 6 and the second sleeve 28 are respectively fixedly connected with the block 9 through the fixed sleeve edge 24, the anti-slip pad 26 has a good anti-slip effect, the block 9 can be fixed through the anti-slip pad 26 and the fixed sleeve edge 24, the situation that the joint of the block 9 and the first screw rod 1 and the second screw rod 10 is loose is avoided, and the disassembly is convenient.
The pair of limiting blocks 27 are symmetrically arranged on the non-slip mat 26, the pair of limiting grooves 25 are symmetrically arranged on the inner wall of the fixed sleeve edge 24, and the pair of limiting blocks 27 are respectively matched and clamped in the pair of limiting grooves 25, so that the non-slip mat 26 is fixedly connected with the fixed sleeve edge 24, the blocking piece 9 is further fixed, and the blocking piece 9 is convenient to disassemble and assemble. Preferably, a pair of stoppers 27 may be disposed at the front and rear ends of the non-slip mat 26, and the pair of stopper grooves 25 may correspond to the pair of stoppers 27.
When the fixing device is used, the first screw rod 1 and the second screw rod 10 play a role in fixing the fixing plate 3 through the fastening threads 2 and the fastening nuts 4, and the first sleeve 6 and the second sleeve 28 are internally connected with the first screw rod 1 and the second screw rod 10 through the internal threads 15 respectively. According to the width of the wall body, the first middle screw 5 and the second middle screw 7 are fixed by adjusting the inserting length of the first middle screw 5 on the first sleeve 6 and the second middle screw 7 on the second sleeve 28 and inserting and fixing the fixing plug 16, the fixing groove 17 and the fixing hole 19. When a wider wall body is encountered, the screw rod at the middle part needs to be lengthened, the sliding rod 22 is fixed at the bottom end of the sliding column 21 through the spring 23, the extending column 8 is fixed at one end of the second middle screw rod 7, the sliding column 21 is fixed at one end of the extending column 8 through the telescopic column 20, the sliding rod 22 slides in the sliding groove 18 by stretching the second middle screw rod 7, under the elastic force of the spring 23, the sliding rod 22 is fixed in the sliding groove 12 through the sliding groove 18, so that the first middle screw rod 5 is fixed with the second middle screw rod 7, the length of the pulling water-stopping screw rod is increased, the water-stopping ring 11 is pulled, the water-stopping ring 11 is fixed between the annular sleeve edge 13 and the arc-shaped sleeve edge 14, the water-stopping ring 11 is fixed, one end of the block 9 is fixedly connected with the fixed sleeve edge 24, and the anti-skid function is realized on the fixed sleeve edge 24 through the arrangement, the limiting block 27 is arranged in the limiting groove 25, has a limiting effect on the fixed sleeve edge 24, and is high in practicability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (7)
1. A three-section adjustable counter-pulling water stop screw comprises a first screw (1), a fastening thread (2), a fixing plate (3), a fastening nut (4), a first sleeve (6), a blocking block (9), a second screw (10), a water stop ring (11) and a second sleeve (28); the two ends of the first screw (1) and the second screw (10) are respectively provided with a fastening thread (2), and the outer side ends of the first screw (1) and the second screw (10) are respectively connected with a fixing plate (3) through the fastening threads (2) and are fixed through a fastening nut (4); the inner side end of the first screw rod (1) is connected with the first sleeve (6) through a fastening thread (2), the inner side end of the second screw rod (10) is connected with the second sleeve (28) through the fastening thread (2), the outer side ends of the first sleeve (6) and the second sleeve (28) are provided with plugging blocks (9), and the water stop ring (11) is arranged on the second sleeve (28);
the method is characterized in that: the three-section adjustable counter-pulling water-stopping screw rod further comprises a first middle screw rod (5), a second middle screw rod (7), an extension column (8), a slide rod groove (12), a slide groove (18), a telescopic column (20), a slide column (21) and a slide rod (22); the first middle screw rod (5) is coaxially fixed at the inner side end of the first sleeve (6), the pair of sliding rod grooves (12) are symmetrically arranged on the first middle screw rod (5), and the pair of sliding grooves (18) are symmetrically arranged on the inner wall of the first middle screw rod (5) and are respectively and correspondingly communicated with the pair of sliding rod grooves (12); the inner side end of the second middle screw rod (7), the extension column (8) and the telescopic column (20) are sequentially and coaxially fixed, the outer side end of the second middle screw rod (7) is coaxially fixed at the inner side end of the second sleeve (28), the pair of sliding columns (21) are symmetrically arranged on the telescopic column (20), and the pair of sliding rods (22) are respectively and correspondingly arranged on the pair of sliding columns (21); the extension column (8) is coaxially inserted into the first middle screw rod (5) and slides relatively, so that the pair of sliding rods (22) can respectively slide along the pair of sliding grooves (18) and are clamped and positioned correspondingly to the pair of sliding rod grooves (12), and the first middle screw rod (5) is fixedly connected with the second middle screw rod (7).
2. The three-segment adjustable counter-pulling water stop screw according to claim 1, which is characterized in that: the sliding column (21) is internally provided with a cavity, and the sliding rod (22) is inserted into the cavity of the sliding column (21) through a spring (23) and bounces along the axial direction of the sliding column (21), so that the sliding rod (22) can be tightly propped against the sliding groove (18) and the sliding rod groove (12).
3. The three-segment adjustable counter-pulling water stop screw according to claim 1, which is characterized in that: screw rod (5) in the middle of first on be equipped with fixed orifices (19), be equipped with fixed slot (17) on extending post (8), when extending post (8) and screw rod (5) coaxial grafting in the middle of first and relative slip, fixed orifices (19) can be fixed with fixed slot (17) centering and through fixed stopper (16) embedding, screw rod (7) fixed connection in the middle of messenger screw rod (5) in the middle of first and the second.
4. The three-segment adjustable counter-pulling water stop screw according to claim 1, which is characterized in that: the outer wall of first sleeve (6) and second sleeve (28) on all fixed mounting have annular cover limit (13) and arc cover limit (14), annular cover limit (13) and arc cover limit (14) coaxial interval set up, seal ring (11) set up on second sleeve (28) and lie in between annular cover limit (13) and arc cover limit (14).
5. The three-segment adjustable counter-pulling water stop screw rod according to claim 4, which is characterized in that: the thickness of the water stop ring (11) is equal to the distance between the annular sleeve edge (13) and the arc sleeve edge (14), so that the annular sleeve edge (13) and the arc sleeve edge (14) are attached to two surfaces of the water stop ring (11).
6. The three-segment adjustable counter-pulling water stop screw according to claim 1, which is characterized in that: the outer walls of the first sleeve (6) and the second sleeve (28) are sleeved with fixed sleeve edges (24) through anti-slip pads (26), and the first sleeve (6) and the second sleeve (28) are fixedly connected with the blocking blocks (9) through the fixed sleeve edges (24) respectively.
7. The three-segment adjustable counter-pulling water stop screw rod according to claim 6, which is characterized in that: the antiskid pad (26) is symmetrically provided with a pair of limiting blocks (27), the inner wall of the fixed sleeve edge (24) is symmetrically provided with a pair of limiting grooves (25), and the pair of limiting blocks (27) are respectively matched and clamped in the pair of limiting grooves (25) so that the antiskid pad (26) is fixedly connected with the fixed sleeve edge (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921558080.7U CN211173117U (en) | 2019-09-19 | 2019-09-19 | Three-section adjustable counter-pulling water-stopping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921558080.7U CN211173117U (en) | 2019-09-19 | 2019-09-19 | Three-section adjustable counter-pulling water-stopping screw |
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| Publication Number | Publication Date |
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| CN211173117U true CN211173117U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921558080.7U Active CN211173117U (en) | 2019-09-19 | 2019-09-19 | Three-section adjustable counter-pulling water-stopping screw |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482342A (en) * | 2021-07-02 | 2021-10-08 | 中建一局集团安装工程有限公司 | Opposite-pulling screw rod capable of achieving fastening on single side for cast-in-place wall and using method of opposite-pulling screw rod |
| CN113585754A (en) * | 2021-08-06 | 2021-11-02 | 江苏通平建设工程有限公司 | Syllogic stagnant water screw rod convenient to loading and unloading |
| CN115030495A (en) * | 2022-07-11 | 2022-09-09 | 中建三局集团有限公司 | Novel aluminum template retention pulling piece |
| CN115853266A (en) * | 2022-12-29 | 2023-03-28 | 中建八局第二建设有限公司 | Stay type leak protection thick liquid stagnant water pulling-on piece |
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2019
- 2019-09-19 CN CN201921558080.7U patent/CN211173117U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482342A (en) * | 2021-07-02 | 2021-10-08 | 中建一局集团安装工程有限公司 | Opposite-pulling screw rod capable of achieving fastening on single side for cast-in-place wall and using method of opposite-pulling screw rod |
| CN113482342B (en) * | 2021-07-02 | 2022-07-08 | 中建一局集团安装工程有限公司 | Opposite-pulling screw rod capable of achieving fastening on single side for cast-in-place wall and using method of opposite-pulling screw rod |
| CN113585754A (en) * | 2021-08-06 | 2021-11-02 | 江苏通平建设工程有限公司 | Syllogic stagnant water screw rod convenient to loading and unloading |
| CN115030495A (en) * | 2022-07-11 | 2022-09-09 | 中建三局集团有限公司 | Novel aluminum template retention pulling piece |
| CN115853266A (en) * | 2022-12-29 | 2023-03-28 | 中建八局第二建设有限公司 | Stay type leak protection thick liquid stagnant water pulling-on piece |
| CN115853266B (en) * | 2022-12-29 | 2024-06-11 | 中建八局第二建设有限公司 | Stay type slurry leakage prevention water stop pull tab |
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