CN220625992U - Stretching detection device for steel strand - Google Patents
Stretching detection device for steel strand Download PDFInfo
- Publication number
- CN220625992U CN220625992U CN202322257870.4U CN202322257870U CN220625992U CN 220625992 U CN220625992 U CN 220625992U CN 202322257870 U CN202322257870 U CN 202322257870U CN 220625992 U CN220625992 U CN 220625992U
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- clamp
- steel strand
- hole
- clamping
- locking hole
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 238000001514 detection method Methods 0.000 title claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 238000009864 tensile test Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 description 2
- 206010063659 Aversion Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application discloses a tensile testing device of a steel strand, which comprises a testing table, wherein a support and a hydraulic cylinder are arranged on the testing table, one clamp is arranged on one side of the support, which faces the hydraulic cylinder, the other clamp is arranged on a piston rod of the hydraulic cylinder through a tension sensor, each clamp comprises a conical locking hole and a clamp holder arranged in the locking hole, and the small end of the locking hole faces the other clamp; the wire clamping hole of the clamp is provided with an inner surface imitating twisting of the steel strand, and the first clamp piece and the second clamp piece of the clamp are formed by cutting the same section of steel pipe through a virtual plane passing through the center line of the steel pipe; the holder has an outer peripheral surface having the same shape as the inner peripheral surface of the locking hole, and the large end of the holder protrudes outward beyond the large end of the locking hole. According to the wire clamping device, the inner surface of the wire clamping hole, which is used for imitating twisting of the steel strand, is used for stably connecting the steel strand on the clamp, so that the steel strand is uniformly extruded, the shape of the steel strand can be kept, sliding cannot be generated, and the accuracy of a detection result is guaranteed.
Description
Technical Field
The utility model relates to a tensile detection device for a steel strand.
Background
The steel strand is used as a main stress part of stress components such as a building structure and an electric power facility, strength detection is required before leaving a factory and using the steel strand, the traditional stretching clamp is not suitable for being used as a clamp of the steel strand because the steel strand is of a multi-strand structure, and a clamp structure is provided in a patent number 2022203758548 and a patent named steel strand tension detection device for ensuring stable clamping of the steel strand. Because the steel strand wires are stranded structure, along with the lapse of time, each steel wire in the steel strand wires can produce the aversion gradually to reduce the clamping force of fastening bolt to the steel strand wires, make in tensile testing process, the steel strand wires easily produce the slip in the through-hole, influence testing result.
Disclosure of Invention
In order to solve the above problems, the present utility model provides a tensile testing device for a steel strand, comprising a testing table, on which a bracket and a hydraulic cylinder are mounted at intervals along a first axial direction, the bracket and the hydraulic cylinder are both fixedly mounted on the testing table, a piston rod of the hydraulic cylinder extends out towards the direction of the bracket, two clamps are disposed between the hydraulic cylinder and the bracket, the two clamps have the same structure, one clamp is fixedly mounted on one side of the bracket towards the hydraulic cylinder, the other clamp is fixedly mounted on the end of the piston rod through a tension sensor, each clamp comprises a tapered locking hole and a clamp holder detachably mounted in the locking hole, and the small end of the locking hole of each clamp faces the other clamp; the clamp comprises a wire clamping hole, wherein the wire clamping hole is provided with an inner surface imitating twisting of a steel strand, the clamp comprises a first clamping piece and a second clamping piece, and the first clamping piece and the second clamping piece are formed by cutting a same section of steel pipe through a virtual plane passing through the center line of the steel pipe; the holder has an outer peripheral surface having the same shape as the inner peripheral surface of the locking hole, and the large end of the holder protrudes outward beyond the large end of the locking hole.
In this application, because the wire clamping hole has the internal surface of imitative steel strand wires twisting, the steel strand wires centre gripping is in the wire clamping hole of this holder, utilize and be conical locking hole with first holder and second holder closely support and press together to connect the steel strand wires on anchor clamps steadily, utilize the internal surface of imitative steel strand wires twisting of wire clamping hole, to the tensile in-process of steel strand wires, because the outer peripheral face of steel strand wires obtains even extrusion, the steel strand wires can keep its shape, can not produce the deformation and produce the slip, the accuracy of testing result has been guaranteed.
Further, the clamp further comprises a stretching frame, the stretching frame comprises a front end plate and a rear end plate which are arranged at intervals along the first axis direction, wherein the front end plate is positioned at one side of the rear end plate facing the other clamp, a clamping pipe is fixedly arranged on the front end plate, the inner cavity of the clamping pipe is formed into the locking hole, the clamping pipe comprises a supporting part and a necking part which are integrally formed, the outer diameter of the supporting part is larger than that of the necking part, a step surface is formed between the supporting part and the necking part, the necking part is movably inserted into the supporting hole, and the supporting part is positioned at one side of the supporting hole facing away from the other clamp, so that the clamping pipe is supported on the stretching frame through the step surface; a screwing space is formed between the front end plate and the rear end plate. By means of the stretching frame, the clamp holder can be rotated, so that the outer surface of the steel strand can be tightly attached to the inner surface of the clamp holder.
Further, a pressing part is arranged on the clamping pipe, the pressing part comprises a locking ring and a pressing ring which are sleeved together, the locking ring is screwed on the supporting part through threads, and the pressing ring is tightly pressed on the large end of the clamp holder. The clamp can be pushed by the pressing part, so that the first clamping piece and the second clamping piece of the clamp tightly clamp the steel strand and are stably kept in the clamp, and the clamp is prevented from loosening.
Further, in order to avoid the influence on the clamping of the steel strand, the inner peripheral surface of the central hole of the pressing ring does not inwards exceed the inner peripheral surface of the wire clamping hole.
Specifically, in order to facilitate processing, the pressing part further comprises an annular plate, the locking ring is connected to the radial outer side of the annular plate, the pressing ring is connected to the radial inner side of the annular plate, and an annular cavity is formed between the locking ring and the pressing ring.
Further, in order to tightly clamp the clamp to the stranded wire, the clamp is used to clamp to the stranded wire with a gap between the first clamp and the second clamp when the clamp is clamped to the stranded wire. The gap may be set to 1-2mm in particular. By utilizing the gap, the situation that the first clamping piece and the second clamping piece cannot clamp the steel strand due to abutting and pressing can be avoided.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model.
Fig. 2 is a top view of fig. 1.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is an enlarged view of the clamper.
Detailed Description
Referring to fig. 1-4, in the drawings, the extending direction of the first axis X is the first axis direction.
A tensile testing device of a steel strand comprises a testing table 10, a support 70 and a hydraulic cylinder 20 are mounted on the testing table 10 at intervals along a first axial direction, the support 70 and the hydraulic cylinder 20 are fixedly mounted on the testing table, a cylinder barrel 21 of the hydraulic cylinder 20 is fixedly mounted on the testing table, a piston rod 22 of the hydraulic cylinder extends towards the direction of the support, two clamps are arranged between the hydraulic cylinder 20 and the support 70 and are respectively called a first clamp 61 and a second clamp 62 for convenience of description, the first clamp 61 is fixedly mounted on the end part of the piston rod 22, facing the support 70, of the first clamp, the tension sensor 26 adopts an S-shaped tension pressure sensor U10A in the embodiment, and the second clamp 62 is fixedly mounted on the side, facing the hydraulic cylinder 20, of the support 70.
The two jigs have the same structure, and the structure of the jigs will be described below by taking the first jig 61 as an example. The first clamp 61 includes a tension frame 31 having a frame structure including a front end plate 32 and a rear end plate 34 disposed at intervals along a first axis direction, the front end plate and the rear end plate being coupled together via a tie rod 33, the rear end plate 34 of the first clamp 61 being fixedly mounted on the piston rod 22 via the tension sensor 26, the rear end plate 34 of the second clamp 62 being fixed on the bracket 70. A screwing space 36 is formed between the front and rear end plates.
The front end plate 32 is provided with a support hole 35, which is a through hole extending in the first axis direction, and a holding tube 41 is fixedly installed in the support hole 35. The inner cavity of the holding tube 41 is formed as a tapered locking hole 415, the small end of the locking hole 415 facing the second clamp 62.
The clamping tube 41 includes a support portion 412 and a neck portion 411 integrally formed, the outer diameter of the support portion is larger than that of the neck portion, a stepped surface 413 is formed between the support portion and the neck portion, the neck portion 411 is fixedly inserted into the support hole 35, the support portion 412 is located at a side of the support hole 35 facing away from the second clamp, so that the clamping tube 41 is supported on the front end plate 32 of the stretching frame via the stepped surface 413.
A holder 43 is detachably installed in the locking hole 415, the holder having a grip hole 433, the grip hole 433 having an inner surface imitating twisting of a steel strand, the holder 43 including a first holding member 431 and a second holding member 432, the first holding member 431 and the second holding member 432 being cut from the same length of steel pipe through a virtual plane passing through a center line of the steel pipe. The holder 43 has an outer peripheral surface 434 having the same shape as the inner peripheral surface of the locking hole 415. The large end of the holder extends outwardly beyond the large end of the locking aperture 415.
The holder 43 is adapted to be clamped to the strand with a gap between the first and second clamping members when the holder is clamped to the strand.
A pressing portion 42 is mounted on the holding tube 41, the pressing portion 42 including an annular 421 plate, a locking ring 423 connected to a radially outer side of the annular plate, and a pressing ring 422 connected to a radially inner side of the annular plate, with an annular chamber 426 therebetween. An external thread 414 is provided on the outer circumferential surface of the support portion 412, and an internal thread 425 is provided on the inner circumferential surface of a locking ring 423, which is engaged on the external thread 414 via the internal thread 425, so that the locking ring is screwed on the support portion and the pressing ring 422 is pressed tightly against the large end of the holder 43. The inner peripheral surface of the center hole 424 of the pressing ring does not protrude inward beyond the inner peripheral surface of the wire clamping hole 433.
When the embodiment is adopted to stretch and detect the steel strand, the pressing part 42 is firstly unscrewed, then two ends of the steel strand are respectively inserted into the wire clamping holes 433 through the central holes 424, the clamp 43 is rotated manually through the screwing space, the outer surface of the steel strand is attached to the inner surface of the wire clamping holes, the pressing part 42 is screwed, the first clamping piece and the second clamping piece are tightly clamped on the steel strand, the gap between the first clamping piece and the second clamping piece is controlled to be 1-2mm, the steel strand is fixed on the two clamps, the hydraulic cylinder is started finally, the steel strand is stretched, and the stretching force is detected through the tension sensor 26.
Claims (6)
1. The tension detection device for the steel strand is characterized by comprising a detection table, wherein a bracket and a hydraulic cylinder are arranged on the detection table at intervals along a first axial direction, the bracket and the hydraulic cylinder are fixedly arranged on the detection table, a piston rod of the hydraulic cylinder extends out towards the direction of the bracket, two clamps are arranged between the hydraulic cylinder and the bracket, the two clamps have the same structure, one clamp is fixedly arranged on one side of the bracket towards the hydraulic cylinder, the other clamp is fixedly arranged at the end part of the piston rod through a tension sensor, each clamp comprises a conical locking hole and a clamp holder detachably arranged in the locking hole, and the small end of the locking hole of each clamp faces the other clamp; the clamp comprises a wire clamping hole, wherein the wire clamping hole is provided with an inner surface imitating twisting of a steel strand, the clamp comprises a first clamping piece and a second clamping piece, and the first clamping piece and the second clamping piece are formed by cutting a same section of steel pipe through a virtual plane passing through the center line of the steel pipe; the holder has an outer peripheral surface having the same shape as the inner peripheral surface of the locking hole, and the large end of the holder protrudes outward beyond the large end of the locking hole.
2. The tensile testing device of a steel strand according to claim 1, wherein,
the clamp also comprises a stretching frame, the stretching frame comprises a front end plate and a rear end plate which are arranged at intervals along the first axis direction, wherein the front end plate is positioned at one side of the rear end plate facing the other clamp, a clamping pipe is fixedly arranged on the front end plate, the inner cavity of the clamping pipe is formed into the locking hole, the clamping pipe comprises a supporting part and a necking part which are integrally formed, the outer diameter of the supporting part is larger than that of the necking part, a step surface is formed between the supporting part and the necking part, the necking part is movably inserted into the supporting hole, and the supporting part is positioned at one side of the supporting hole facing away from the other clamp, so that the clamping pipe is supported on the stretching frame through the step surface; a screwing space is formed between the front end plate and the rear end plate.
3. The tension detecting apparatus of claim 2, wherein a pressing part is installed on the clamping tube, the pressing part including a locking ring and a pressing ring which are sleeved together, the locking ring being screwed on the supporting part, the pressing ring being closely pressed against the large end of the clamp.
4. A steel strand tensile testing device according to claim 3, wherein the inner peripheral surface of the center hole of the pressing ring does not protrude inward beyond the inner peripheral surface of the wire clamping hole.
5. The tensile testing device of a steel strand according to claim 3, wherein,
the pressing part also comprises an annular plate, the locking ring is connected to the radial outer side of the annular plate, the pressing ring is connected to the radial inner side of the annular plate, and an annular cavity is formed between the locking ring and the pressing ring.
6. The tensile testing device of a steel strand according to claim 3, wherein,
the clamp is used for clamping on a steel strand, and when the clamp is clamped on the steel strand, a gap is reserved between the first clamping piece and the second clamping piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257870.4U CN220625992U (en) | 2023-08-21 | 2023-08-21 | Stretching detection device for steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257870.4U CN220625992U (en) | 2023-08-21 | 2023-08-21 | Stretching detection device for steel strand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220625992U true CN220625992U (en) | 2024-03-19 |
Family
ID=90221658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322257870.4U Active CN220625992U (en) | 2023-08-21 | 2023-08-21 | Stretching detection device for steel strand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220625992U (en) |
-
2023
- 2023-08-21 CN CN202322257870.4U patent/CN220625992U/en active Active
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