CN115324356B - Stretching machine for metal steel bar - Google Patents
Stretching machine for metal steel bar Download PDFInfo
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- CN115324356B CN115324356B CN202210980305.8A CN202210980305A CN115324356B CN 115324356 B CN115324356 B CN 115324356B CN 202210980305 A CN202210980305 A CN 202210980305A CN 115324356 B CN115324356 B CN 115324356B
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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
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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Abstract
The invention relates to the technical field of metal processing, in particular to a tensioning machine for a metal steel rod, which comprises an embedded mechanism, a locking mechanism and a piston mechanism, wherein the embedded mechanism comprises an anchor backing plate embedded on a flat end surface, a through hole is formed in the end surface of the anchor backing plate for inserting the steel rod to be processed, and the locking mechanism comprises a working anchor and a working clamp which are sequentially arranged on one side of the anchor backing plate. According to the invention, the adhesive force to the steel bar when the steel bar is tensioned is enhanced by utilizing the fixing piece between the working anchor and the working clamp for fixing the steel bar, the phenomenon of sliding wire is avoided, after the anchor and the clamp sequentially pass through the steel bar, the rotary blade is rotated by a certain angle by utilizing the cooperation between the guide button and the rotary blade arranged on the piston mechanism, and when the rotary blade is screwed into the concave surface of the fixing piece, the two bending ends of the fixing piece are opened and respectively propped against the hole in the anchor and the steel bar, so that the fixing effect is enhanced.
Description
Technical Field
The invention relates to the technical field of metal processing, in particular to a tensioning machine for a metal steel rod.
Background
In the treatment process of metal rods in various fields such as buildings, bridges and the like, the metal rods are required to be pulled in advance, so that the metal rods subjected to prestress tensioning bear compressive stress, and have certain deformation, and the durability of the metal rods in use can be effectively improved.
The application field of stretching and drawing combined stretching construction of the metal rod is mainly divided into pre-processing and construction site processing, but the core aims to enable the steel rod to bear stress by applying tension to the steel rod, the traditional stretching is basically carried out through the cooperation of an anchor and a jack, and when the anchor is installed, due to the fact that the fixing mode of the steel rod is single, the phenomenon of sliding wires exists in the pulling process of the steel rod when the service time of some clamping pieces is too long, so that stretching failure is caused, and even reinstallation is needed for calibration.
Therefore, a tensioning machine for metal steel bars is proposed to solve the above-mentioned problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects existing in the prior art, the invention provides a tensioning machine for a metal steel rod, which can effectively solve the problem that the fixing mode of the steel rod in the tensioning engineering of the steel rod in the prior art is single.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the invention provides a tensioning machine for a metal steel rod, which comprises an embedding mechanism, a locking mechanism and a piston mechanism, wherein the embedding mechanism comprises an anchor backing plate embedded on a flat end surface, a through hole is formed in the end surface of the anchor backing plate for inserting a steel rod to be processed, the locking mechanism comprises a working anchor and a working clamp which are sequentially arranged on one side of the anchor backing plate, a taper hole for inserting the steel rod is formed in the end surface of the working anchor, the working clamp is sleeved on the steel rod and inserted into the taper hole, and the piston mechanism abuts against one side of the working clamp and drives the steel rod to move in the opposite direction of the working clamp.
The fixing parts are integrally in a bent platy structure, the force application point of one bending end faces the steel bar, the other bending end is arranged on the outer side of the groove and can be abutted against the hole wall in the taper hole to increase the adhesive force to the steel bar.
Further, the working clamp comprises a rotary blade, the whole working clamp is in a round table shape with a round table-shaped cavity inside, the rotary blade is rotatably arranged in the working clamp, one side of the rotary blade can be screwed between concave surfaces of the fixing piece, and meanwhile force is applied to corresponding end surfaces of the two bending ends.
Further, the rotary blade comprises a rotating part and a collision part, the rotating part is concentric and coaxial with the working clamp and is matched with the piston mechanism to rotate in the tool clamp, the collision part is integrally of a T-shaped structure and is arranged on one side of the rotating part, the short arm end of the collision part can be screwed into the concave surface of the fixing part along with the rotation of the rotating part, and the thickness of the part of the collision part screwed into the concave surface of the fixing part is gradually increased along the rotation direction.
Further, an arc-shaped groove is formed in the outer side end of the rotating portion, the arc-shaped groove comprises a guide portion and a bending portion, the guide portion is automatically rotated to extend towards the axial direction of the working anchor towards one end of the piston mechanism, the bending portion is bent towards the tangential direction of the rotating portion from one side of the guide portion, a guide button capable of being inserted into the arc-shaped groove is arranged in the piston mechanism, and the guide button can axially move towards the direction where the working anchor is located in the arc-shaped groove.
Further, a piece of conflict piece has been set firmly in the piston mechanism, offer the jack corresponding with the taper hole on the conflict piece, a fixed plate is installed perpendicularly respectively to one side of every jack, the direction button is installed perpendicularly in the vertical side of fixed plate and inserts in the arc wall when moving along with piston mechanism toward the spiral slice direction.
Further, the bottom end of the guide button is hemispherical, and the tail end of the bending part is polished smoothly.
Further, the guide button is movably connected with the fixed plate, a limit hole is formed in the plate surface of the fixed plate, one side of the guide button is inserted into the limit hole, and a spring is arranged between the guide button and the limit hole.
Further, the fixing piece further comprises a lug, an annular cavity is formed in the taper hole, the lug is arranged on one side end face, facing the inner wall of the taper hole, of the fixing piece, the cross section of the side end of the lug is triangular, anti-slip patterns are distributed on the inclined surface of the lug, and meanwhile the side end of the lug is intersected with the side wall of the annular cavity.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
according to the invention, the adhesive force to the steel bar when the steel bar is tensioned is enhanced by utilizing the fixing piece between the working anchor and the working clamp for fixing the steel bar, the phenomenon of sliding wire is avoided, after the anchor and the clamp sequentially pass through the steel bar, the rotary blade is rotated by a certain angle by utilizing the cooperation between the guide button and the rotary blade arranged on the piston mechanism, and when the rotary blade is screwed into the concave surface of the fixing piece, the two bending ends of the fixing piece are opened and respectively propped against the hole in the anchor and the steel bar, so that the fixing effect is enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is an exploded view of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the working state of a metal steel bar in an embodiment of the invention;
FIG. 3 is a schematic diagram of the installation sequence of the working mechanism in the embodiment of the invention;
FIG. 4 is a schematic side cross-sectional view of a work anchor in accordance with an embodiment of the present invention;
FIG. 5 is an exploded view of a work fixture according to an embodiment of the present invention;
FIG. 6 is a schematic view of the movement of the work clamp inserted into the work anchor in an embodiment of the present invention;
FIG. 7 is a schematic side cross-sectional view of a work clamp locking structure in accordance with an embodiment of the present invention;
FIG. 8 is a schematic view of a partial side cross-sectional structure of a rotary blade in accordance with an embodiment of the present invention;
FIG. 9 is a schematic view of FIG. 8A according to an embodiment of the present invention;
FIG. 10 is a diagram showing a state of movement of a guide button according to an embodiment of the present invention;
fig. 11 is a partial side cross-sectional view of a guide knob in an embodiment of the invention.
Reference numerals in the drawings represent respectively: 1. a pre-burying mechanism; 11. an anchor backing plate; 111. perforating; 12. a limiting plate; 2. a locking mechanism; 21. working anchors; 211. taper holes; 212. an annular cavity; 22. a working clamp; 221. a fixing member; 222. a groove; 223. a tab; 224. a rotary vane; 2241. a rotating part; 2242. a collision part; 2243. an arc-shaped groove; 2244. a guide part; 2245. a bending portion; 225. an outer frame body; 3. a piston mechanism; 31. a guide button; 32. a contact piece; 321. a jack; 322. a fixing plate; 323. a limiting hole; 324. a spring; 4. a tool anchor; 41. a tool holder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is further described below with reference to examples.
Examples:
in the processing process or the practical application process of the metal steel bar (bar, rib and winch), the body of the steel bar is required to be pulled by external force, the body member is pulled in advance, and certain deformation is generated to cope with the load born by the structure, so that the bending resistance and rigidity of the steel bar body are effectively improved.
The current general mode is to fix one side of a metal steel bar, sleeve the outside of the steel bar by utilizing an anchor backing plate and embed the anchor backing plate on a flat end face, sleeve working anchors on the steel bar correspondingly and sequentially, insert working clamps into each hole of the working anchors, and apply traction force to the steel bar through a piston mechanism (a special jack is commonly used) at the moment so as to achieve the tensioning effect.
In the practical process, the outer sides of the steel bars are combined with the surface profile patterns which are actually needed are different, so that in the tensioning process, the sliding wire and the displacement of the anchoring structure are easily caused by insufficient friction force between the steel bars, and the tensioning effect is influenced.
For this purpose, referring to fig. 1 to 11, a tensioning machine for metal steel bars is proposed, which aims to solve the problem that when traction force is applied to the steel bars, the adhesion force between the metal steel bars and the steel bars can be increased, and the tensioning effect is ensured, and specifically, the whole device comprises three parts, namely an embedded mechanism 1, a locking mechanism 2 and a piston mechanism 3, in the preparation of tensioning, a flat end surface for fixing the steel bars is required to be prepared, after the steel bars are inserted into the end surface, the anchor backing plate 11 is embedded into the end surface to provide guiding insertion of the steel bars, the end surface of the anchor backing plate 11 is provided with perforations 111, the steel bars to be processed can penetrate into the perforations 111, nine perforations 111 in the example are provided, and tensioning of nine steel bars can be simultaneously carried out.
After cleaning sand grains with holes on the end face and other dirt, a working anchor 21 is installed on one side of the anchor pad 11, a taper hole 211 for inserting a steel rod is formed in the end face of the working anchor 21, the steel rod is inserted into the taper hole 211 in a one-to-one correspondence mode, a working clamp 22 is sleeved on the outer side of the steel rod and then is extruded into the taper hole 211, in the extrusion process, a limiting ring with the aperture larger than that of the taper hole 211 is arranged at the tail end of the working clamp 22, the working clamp 22 is completely extruded into the taper hole 211 by knocking or other modes, an annular cavity 212 is formed in the inner hole wall of the taper hole 211, the inner hole wall of each taper hole 211 is smoothly processed, in the extrusion process of the working clamp 22, the protruding piece 223 on the working clamp 22 is extruded easily until the protruding piece 223 pops up along with the bending end on one side of the fixing piece 221, a preset fixing position is reached, and whether the fixing piece 221 reaches the annular cavity 212 can be judged by judging clear and 'pyridazining' sound.
It should be noted that, in this embodiment, one end of the fixing member 221 is connected to the inner wall of the groove 222, in the process of sleeving the metal steel bar (the rib and the hinge rope), the bending end of the fixing member 221 facing the steel bar will not collide with the steel bar, and a certain collision force exists between the bending end facing one side of the taper hole 211 and the inner wall of the taper hole 211, but the inner wall of the taper hole 211 is smooth, when the fixing member reaches the annular cavity 212, the bending end pops out, but will not collide with the inner wall of the annular cavity 212, but a tab 223 is mounted at the bending end facing the inner wall of the taper hole 211, the side end section of the tab 223 is triangular, the tab 223 will cross with the side wall of the annular cavity 212 along with the bouncing of the bending end to generate dislocation, and will not easily receive the pulling back force to retract.
In the actual use process, the taper hole 211 can be in a shape of a circular truncated cone, after the same whole is extruded into the circular truncated cone-shaped working fixture 22, the fixing effect is achieved, and the technology of pulling the steel rod by the piston mechanism 3 is known in the prior art, which is not described in detail in the drawings.
The inclined plane of the lug 223 in this example is obtuse with the cross section of the inner wall of the conical hole 211, when the working clamp 22 is pushed in, the contact area between the inclined plane of the lug 223 and the cross section of the inner wall of the conical hole 211 is small, the friction force is limited, after the fixing piece 221 reaches the vicinity of the annular cavity 212, and the two bending ends of the fixing piece 221 are unfolded through the rotation of the rotary piece 224, the angle between the lug 223 close to the direction of the conical hole 211 and the cross section of the annular cavity 212 can be changed, the contact is close to parallel, and anti-skid patterns are distributed on the end face attached to the inner wall of the conical hole 211, so that the fixing effect is further improved.
In addition, after the extrusion process of the working fixture 22 is completed, a circle of cylindrical limiting plate 12 is sleeved on one side of the working anchor 21, the limiting plate 12 and the working anchor 21 are kept on the same axis, one end of the piston mechanism 3 is sleeved on the outer side of the limiting plate 12, the same locking mechanism 2 is mounted on the other side of the piston mechanism 3, the mounting process and the sequence are the same as those of the locking mechanism 2, the size and the shape of the tool anchor 4 to be mounted are the same as those of the working anchor 21 (the hole wall inside the tool anchor 4 is not provided with the annular cavity 212), and the tool anchor 4 can be pulled out from the hole inside the tool anchor 4 directly when the tool anchor 41 is dismounted, and the annular cavity 212 is arranged inside the working anchor 21, so that the tool anchor 4 can be quickly separated from the whole tensioning device and can be used repeatedly.
Meanwhile, the tool clamp 41 is the same as the working clamp 22 in size and shape, and the installation direction is the same, at the moment, the special jack for tensioning is adopted in the example through the piston mechanism 3, so that the special working process is not excessively repeated in the prior art, the traction purpose is mainly achieved, other structures can be used as tensioning oil pumps for replacing the inner part to feed oil into the oil inlet nozzle in the actual use process, the piston is enabled to move forwards under the pushing action of high-pressure oil, and the steel bar is driven to move under the action of the tool anchor 4, so that tensioning of the steel bar is achieved.
And when the piston mechanism 3 is sleeved outside the limiting plate 12, the guide buttons 31 on the abutting pieces 32 arranged in the piston mechanism 3 are matched with the rotary pieces 224 arranged on the working clamp 22 one by one, so that the rotary pieces 224 rotate at a certain angle, at this time, the abutting portions 2242 on the rotary pieces 224 rotate into the concave surface of the fixing piece 221 along with the rotation of the rotating portions 2241, and the thickness of the portion of the abutting portions 2242 in the concave surface of the fixing piece 221 along the rotation direction thereof is gradually increased, so that the two bending ends of the fixing piece 221 are unfolded and respectively abut against the inner wall of the steel bar and the taper hole 211.
The locking mechanism 2 comprises a working anchor 21 and a working clamp 22 which are sequentially arranged on one side of the anchor pad 11, the working clamp 22 is sleeved on a steel rod and inserted into the taper hole 211, and the piston mechanism 3 abuts against one side of the working clamp 22 and drives the steel rod to move in the opposite direction of the working clamp 22.
The working fixture 22 in this example mainly includes two parts, is that the round platform form outer frame body 225 that is inside to be equipped with round platform form cavity and rotates the rotary vane 224 that installs in the outer frame body and constitute, the rotary vane 224 rotates to install in outer frame body 225, and be located on the rotary vane 224 and keep away from one side terminal surface of anchor backing plate 11 and seted up arc slot 2243, arc slot 2243 includes guiding part 2244 and bending part 2245, guiding part 2244 is radial extension of working anchor 21 from the rotary vane 224 towards one end of piston mechanism 3, bending part 2245 is crooked from one side of guiding part 2244 to the tangential direction of rotating part 2241.
When the piston mechanism 3 moves towards the direction of the working clamp 22 and is sleeved, an abutting piece 32 is installed in the piston mechanism 3, an insertion hole 321 corresponding to the taper hole 211 is formed in the abutting piece 32, one side of each insertion hole 321 is vertically provided with a fixing plate 322, the guide button 31 is vertically installed on the vertical side of the fixing plate 322 and is inserted into the arc-shaped groove 2243 when the piston mechanism 3 moves towards the direction of the rotary piece 224, accordingly, along with continuous insertion, the guide button 31 can apply force to the groove wall of the arc-shaped groove 2243, the rotary piece 224 rotates at a certain angle, after the rotary piece 224 rotates, one side of the rotary piece 224 is screwed into the concave surface of the fixing piece 221, two bending ends are propped open, and the two bending ends are respectively abutted against the inner wall of the hole and the steel bar.
And three grooves 222 are radially formed in the outer side end of the outer frame body along the steel bar, the three grooves 222 are circumferentially distributed on the outer side of the outer frame body, a fixing piece 221 is respectively arranged in each groove 222, the fixing piece 221 is of a bent plate-shaped structure, the intersection point is arranged on the wall of the groove 222, the force application point of one bending end faces the steel bar, the other bending end is arranged on the outer side of the groove 222 and can be abutted against the wall of the hole in the taper hole 211, and the adhesive force to the steel bar is increased.
The rotary blade 224 integrally includes a rotating portion 2241 and a abutting portion 2242, the rotating portion 2241 is concentric with the working clamp 22 and is matched with the piston mechanism 3 to rotate in the working clamp 22, the abutting portion 2242 integrally has a T-shaped structure and is circumferentially distributed on one side of the rotating portion 2241, the short arm end of the abutting portion 2242 can be screwed into the concave surface of the fixing member 221 along with the rotation of the rotating portion 2241, and due to a certain thickness, when the abutting portion 2242 is screwed in, both bending ends of the fixing member 221 can receive extrusion forces, under the stimulation of the force, the two bending ends can be unfolded in opposite directions, and meanwhile, the thickness of the part of the abutting portion 2242 abutting in the concave surface of the fixing member 221 is gradually increased along with the rotation direction, so that the abutting force can be gradually increased along with the screwing degree.
The piston mechanism 3 in this example is fixedly provided with a piece of abutting piece 32, the abutting piece 32 is provided with insertion holes 321 corresponding to the taper holes 211, one side of each insertion hole 321 is vertically provided with a fixing plate 322, the guide button 31 is vertically arranged on the vertical side of the fixing plate 322 and is inserted into the arc-shaped groove 2243 along with the movement of the piston mechanism 3 towards the direction of the spiral piece 224, the bottom end of the guide button 31 in this example is hemispherical, and the tail end of the bending part 2245 is smoothly polished, when the tail end needs to be disassembled, the guide button 31 is rotated out from one side of the bending part 2245 by forcefully rotating the piston mechanism 3 by a certain angle, at this time, the piston mechanism 3 is pulled out in the opposite direction of the installation direction, and the working clamp 22 does not have excessive movement and is difficult to be released from the working anchor 21.
In the actual use process, the working anchors 21 can be replaced by the tool anchors 4 in the prestress processing process of the steel bar, so that two working anchors 21 can be pulled out from the outer side of the steel bar, and the pulling out principle of the working clamp 22 is the same as that of the tool clamp 41, and redundant description is omitted here; when the working anchor 21 and the tool anchor 4 are matched in the tensioning construction process of bridges and buildings, after the tensioning engineering is completed, the piston mechanism 3 is pulled out from one side of the working anchor 21, and concrete is injected into a hole in which a steel rod (a winch) is placed (the working anchor 21 and the working clamp 22 are not taken out).
The matched abutting piece 32 between the tool anchor 4 and the tool clamp 41 at the other side of the piston mechanism 3 is detachable on the piston mechanism 3, so that the abutting piece 32 can be guided to move (pull out) along the opposite direction of the installation direction, the rotating piece 224 arranged on the tool clamp 41 is reversely rotated in the pulling process, the guide button 31 moving to the bending part 2245 can return, the structure of the rotating piece 224 in the tool clamp 41 can be separated from the concave surface of the fixing piece 221 in the pulling process, the fixing piece 221 is not extruded, and the tool clamp 41 can be pulled out from the hole of the tool anchor 4 conveniently, so that the tool clamp can be used for the second time.
While the working anchor 21 and the working clamp 22 remain firmly fixed after use.
Preferably, in this embodiment, the guiding knob 31 is movably connected with the fixed plate 322, a limiting hole 323 is formed on the plate surface of the fixed plate 322, one side of the guiding knob 31 is inserted into the limiting hole 323, a spring 324 is arranged between the guiding knob 31 and the limiting hole 323, and when the working anchor 21 and the piston mechanism 3 are removed, the guiding knob 31 can be conveniently retracted into the fixed plate 322.
In various application scenarios, for example, in the construction site, the steel strand (prestressed tendon) is tensioned, the corresponding anchor pad 11, the working anchor 21 and the working clamp 22 required for installation can be sequentially installed in the annular hole formed on the concrete surface, when the steel rod is processed and manufactured or prestressed and deeply processed, the device can be flexibly matched with the steel rod for use, the application scenario is various, and in addition, one end tensioning process and two ends tensioning process are all known techniques and are not repeated herein.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A tensioner for metal steel bars, comprising:
the embedded mechanism comprises an anchor backing plate embedded on the flat end surface, and the end surface of the anchor backing plate is provided with a through hole for inserting a steel rod to be processed;
the locking mechanism comprises a working anchor device and a working clamp which are sequentially arranged on one side of the anchor backing plate, a taper hole for inserting a steel rod is formed in the end face of the working anchor device, and the working clamp is sleeved on the outer side of the steel rod and inserted into the taper hole;
the piston mechanism is propped against one side of the working clamp and drives the steel rod to move in the opposite direction of the working clamp;
the fixing piece is integrally in a bent plate-shaped structure, a force application point of one bending end faces the steel bar, and the other bending end is arranged on the outer side of the groove and can be abutted against the hole wall in the taper hole;
the working clamp comprises a rotary vane, the whole working clamp is in a round table shape, a round table-shaped cavity is formed in the round table-shaped cavity, the rotary vane is rotatably arranged in the working clamp, one side of the rotary vane can be screwed between concave surfaces of the fixing piece, and the corresponding end surfaces of the two bending ends are simultaneously forced;
the rotary vane comprises a rotating part and a collision part, the rotating part is concentric and coaxial with the working clamp and is matched with the piston mechanism to rotate in the working clamp, the collision part is of a T-shaped structure and is arranged on one side of the rotating part, the short arm end of the collision part can be screwed into the concave surface of the fixing part along with the rotation of the rotating part, and the thickness of the part of the collision part screwed into the concave surface of the fixing part is gradually increased along the rotation direction.
2. The tension machine for metal steel bars according to claim 1, wherein an arc-shaped groove is provided at an outer side end of the rotating part, the arc-shaped groove comprising:
the guide part is provided with a rotary piece which extends towards the axial direction of the working anchor device from one end of the piston mechanism;
a bending portion which is bent from one side of the guide portion toward a tangential direction of the rotating portion;
wherein, be located the piston mechanism is equipped with a guide button that can insert in the arc wall, the guide button can be in the arc wall to the axial motion of work ground tackle place direction.
3. The tension machine for the metal steel bar according to claim 2, wherein a piece of abutting piece is fixedly arranged in the piston mechanism, insertion holes corresponding to the taper holes are formed in the abutting piece, one side of each insertion hole is vertically provided with a fixing plate, and the guide button is vertically arranged on the vertical side of the fixing plate and is inserted into the arc-shaped groove when moving along with the piston mechanism in the direction of the rotary piece.
4. A tensioning machine for a metal steel bar according to claim 3, wherein the bottom end portion of the guide knob has a hemispherical shape, and the end of the bent portion is subjected to a smooth grinding process.
5. A tensioning machine for metal steel bars according to claim 3, characterized in that the guiding button is movably connected with the fixing plate, a limiting hole is formed in the plate surface of the fixing plate, one side of the guiding button is inserted into the limiting hole, and a spring is arranged between the guiding button and the limiting hole.
6. A tensioning machine for metal steel bar according to claim 3, wherein the fixing member further comprises a protruding piece, an annular cavity is formed in the conical hole, the protruding piece is mounted on one side end face of the fixing member facing the inner wall of the conical hole, the cross section of the side end of the protruding piece is triangular, anti-skid patterns are distributed on the inclined face of the protruding piece, and meanwhile the side end of the protruding piece is intersected with the side wall of the annular cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980305.8A CN115324356B (en) | 2022-08-16 | 2022-08-16 | Stretching machine for metal steel bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980305.8A CN115324356B (en) | 2022-08-16 | 2022-08-16 | Stretching machine for metal steel bar |
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| Publication Number | Publication Date |
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| CN115324356A CN115324356A (en) | 2022-11-11 |
| CN115324356B true CN115324356B (en) | 2023-08-22 |
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| CN202210980305.8A Active CN115324356B (en) | 2022-08-16 | 2022-08-16 | Stretching machine for metal steel bar |
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| CN211815638U (en) * | 2020-04-01 | 2020-10-30 | 郭晓 | Prestressed steel strand tensioning anchorage device for bridge construction |
| CN214656391U (en) * | 2020-12-22 | 2021-11-09 | 河南鑫荣重工有限公司 | Prestressed anchorage device steel strand stretching device |
| CN114439523A (en) * | 2021-12-28 | 2022-05-06 | 杭州图强工程材料有限公司 | Expansion shell type anchoring head and anchor rod |
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| CN115324356A (en) | 2022-11-11 |
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