CN205506555U - A anchor clamps for on horizontal steel strand wires relaxation testing machine - Google Patents
A anchor clamps for on horizontal steel strand wires relaxation testing machine Download PDFInfo
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- CN205506555U CN205506555U CN201620289519.0U CN201620289519U CN205506555U CN 205506555 U CN205506555 U CN 205506555U CN 201620289519 U CN201620289519 U CN 201620289519U CN 205506555 U CN205506555 U CN 205506555U
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Abstract
The utility model discloses an anchor clamps for on horizontal steel strand wires relaxation testing machine. Including frustum of a cone form chuck of connecting load cell on fixed cross beam, making up by at least two grip blocks and the sleeve that matches with this chuck, the circular conical surface phase -match of telescopic internal surface and chuck, the center of chuck has the centre gripping hole, be equipped with the automatic centering board between sleeve and load cell, the one end of automatic centering board is equipped with the ball socket of indent, corresponds the ectosphere facial features adaptation that sets up with sleeve one end, telescopic another end screw thread connection has gland nut for each grip block atress is even, is difficult for jamming, damage, and the sample also is difficult for the jamming and in the taper sleeve, conveniently takes out, when telescopic internal cone face axial displacement was followed to each grip block, the sleeve can rotate on the automatic centering board, has further improved the centering precision, also made the accuracy of test result obtain improving, the utility model discloses an anchor clamps still are equipped with the security of lag, the experiment of assurance.
Description
Technical field
This utility model relates to a kind of testing machine fixture, a kind of fixture for horizontal the steel strand relaxation test machine.
Background technology
At bridge, during the foundation constructions such as highway, particularly in prestressed concrete construction, substantial amounts of use steel strand wires, owing to pulling force and the stress of steel strand wires have conclusive effect for construction quality, therefore, generally before construction and in work progress, the steel strand wires used are carried out tensile strength, stretching force, maximum, force, tensile property parameter and the stress relaxation forces such as percentage of total elongation, relaxation stress, relaxation force iso-stress relaxation property parameter is tested, these performances can be measured by existing stretching relaxation testing machine, the two ends of steel strand wires are needed to be clamped before test, wire-clamping device is generally only common chuck, when steel strand wires under tension, a small amount of skidding is had between steel strand wires and wire-clamping device, affect the accuracy of last measurement result.There is people that existing fixture is improved for this, as State Intellectual Property Office in disclosed in 6 days February in 2013 by Ruan Haixiang, Ruan Weixin, Xu Feng design, the utility model patent of the entitled a kind of wire-clamping device stretching relaxation testing machine of Patent No. 201220300332.8, the frusto-conical chuck being combined into including some pieces of little fixture blocks and a sleeve matched with it, on the taper seat of chuck, there is external screw thread, the inner surface of sleeve matches with the taper seat of chuck, the inner surface of sleeve has female thread, external screw thread matches with female thread, the center of chuck has clamping hole, there is on the inner surface in clamping hole the anti-skidding rib of some and chuck axis perpendicular.This wire-clamping device, being matched with the screw thread on the conical surface of sleeve by chuck, when making turnbarrel, each little fixture block moves to the center of chuck, thus steel strand wires are clamped, and it is provided with anti-skidding rib on clamping hole, it is possible to prevent the steel strand wires skidding when under tension effect.But, owing to prestress wire is formed by many steel wire twisteds under the high speed rotating of wire twisting machine, outer surface is not the face of cylinder of rule, and owing to there being the existence of circular gap between each little fixture block, after sample inserts in the clamping hole of fixture, during turnbarrel, each little fixture block the non-concurrent of fixture move to the center of chuck, thus cause accuracy of alignment to reduce, and result of the test is inaccurate；Sample contacts bad with little fixture block, and each little fixture block stress is the most uneven, is easily damaged, and sample clamping stagnation is not easily taken out in tapered sleeve；And unshielded device, sample breaks or during other maloperations, and sleeve, little fixture block can fall from equipment or fly out, cause the accident.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of centering is good, chucking power uniformly, be hardly damaged, the quick detachable taking-up of sample the fixture on horizontal the steel strand relaxation test machine with preventer.
This utility model be the technical scheme is that for achieving the above object
A kind of fixture on horizontal the steel strand relaxation test machine, the frusto-conical chuck including the load sensor being connected on fixed cross beam, being combined into by least two pieces of grip blocks and the sleeve matched with this chuck, the inner surface of sleeve matches with the taper seat of chuck, the center of chuck has clamping hole, the inner surface in clamping hole is provided with anti-skidding rib, it is characterized in that: be provided with automatic centering plate between described sleeve and load sensor, the ball-and-socket that one end of automatic centering plate is provided with indent is suitable with the spherical outside surface that sleeve one end is correspondingly arranged；The other end of sleeve is threaded clamp nut, and the inner face of clamp nut is pressed against the end of grip block larger diameter end, and clamp nut is provided with the diameter centre bore more than sample external diameter；Automatic centering plate is provided with the diameter external diameter more than sample and the centre bore more than grip block smaller diameter end external diameter；The outside of automatic centering plate is placed in the first endoporus of positioning sleeve, and sleeve is placed in the second endoporus of positioning sleeve；Positioning sleeve is fixed on fixed cross beam.
Installing for convenience, described load sensor selects its end sensor with boss that is stressed, and the other end of described automatic centering plate is provided with the location rim of the mouth suitable with this boss.
Sleeve concomitant rotation during in order to prevent from rotating clamp nut, the sidewall of described positioning sleeve is provided with spline pin through hole, and sleeve is correspondingly provided with spline pin blind hole, and spline pin can be inserted in spline pin blind hole through spline pin through hole.
For experimental safe, described positioning sleeve having protective jacket away from the wall outer surface of its first endoporus is threaded, protective jacket is provided with the diameter centre bore more than sample external diameter.
In order to the most easy for installation, the end of the larger diameter end of described grip block is provided with draw-in groove.
As preferred structure of the present utility model, described grip block is three, is uniformly distributed circumferentially.
In this utility model, the first endoporus of described positioning sleeve and the second female coaxial, the diameter of the first endoporus is more than the diameter of the second endoporus；The external diameter of described sleeve is less than the diameter of the second endoporus；The external diameter of described automatic centering plate is less than the diameter of the first endoporus.
In this utility model, the degree of depth of described second endoporus is more than the height of load sensor boss and the thickness sum of automatic centering plate.
In order to easy for installation, described positioning sleeve has one end of the first endoporus and is provided with outer boss flange, outer boss flange is provided with through hole corresponding with the installing hole of load sensor, and load sensor and positioning sleeve are fixed on fixed cross beam by screw through the installing hole of this through hole and load sensor.
Work process of the present utility model is as follows:
Before starting test, in sleeve, it is coated with mould oil when chuck is installed prevents grip block clamping stagnation, it is inserted into spline pin at the spline pin through hole of positioning sleeve and the spline pin blind hole of sleeve, sample is inserted in the clamping hole of chuck, then clamp nut is screwed on sleeve, make clamp nut compression clamping block be clamped by sample, then transfer to spline pin；Protective jacket is screwed on positioning sleeve and can proceed by test.
This utility model has the advantages that compared to prior art
Fixture on horizontal the steel strand relaxation test machine of the present utility model, which is provided with automatic centering plate, after sample inserts in the clamping hole of chuck, when rotatably compressing nut, each grip block of chuck is pressed against the end of grip block larger diameter end by the inner face of clamp nut simultaneously, promote each grip block axially simultaneously to move and then produce radial displacement sample is clamped, sample contacts with grip block well, each grip block uniform force, it is difficult to clamping stagnation, damage, sample is not easy to clamping stagnation in tapered sleeve, convenient takes out；While each grip block moves axially along the internal conical surface of sleeve, sleeve can rotate in the ball-and-socket on automatic centering plate, coaxial with adjust that processing or installation etc. cause, further increases accuracy of alignment, also makes the accuracy of result of the test be improved；Fixture of the present utility model is additionally provided with protective jacket, it is ensured that the safety of test.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the A-A cross-sectional schematic in Fig. 1.
Fig. 3 is the schematic front view of the positioning sleeve in this utility model.
Fig. 4 is that the right side of the positioning sleeve in this utility model regards schematic diagram.
Fig. 5 is the schematic front view of the automatic centering plate in this utility model.
Fig. 6 is that the right side of the automatic centering plate in this utility model regards schematic diagram.
Fig. 7 is the schematic front view of the sleeve in this utility model.
Fig. 8 is that the right side of the sleeve in this utility model regards schematic diagram.
In figure: 1-protective jacket, 2-clamp nut, 3-grip block, 4-sleeve, 5-positioning sleeve, 6-spline pin, 7-automatic centering plate, 8-screw, 9-load sensor, 10-fixed cross beam, 11-clamps hole, 12-draw-in groove, the outer boss flange of 13-, 14-spline pin through hole, 15-through hole, 16-the first endoporus, 17-the second endoporus, 18-positions rim of the mouth, 19-ball-and-socket, 20-spherical outside surface, 21-spline pin blind hole.
Detailed description of the invention
For the technical characterstic of this programme can be clearly described, below by detailed description of the invention, and combine accompanying drawing, this utility model is described further.
With reference to Fig. 1, Fig. 2, a kind of fixture on horizontal the steel strand relaxation test machine, fixed cross beam is provided with rim of the mouth, location, and the non-stress end of load sensor is placed in this rim of the mouth, location；Positioning sleeve has the first endoporus and the second endoporus, positioning sleeve has one end of the first endoporus and is provided with outer boss flange, outer boss flange is provided with through hole corresponding with the installing hole of load sensor, and load sensor and positioning sleeve are fixed on fixed cross beam by screw through the installing hole of this through hole and load sensor；The end that is stressed of load sensor is with boss, and the ball-and-socket that one end of automatic centering plate is provided with indent is suitable with the spherical outside surface that sleeve one end is correspondingly arranged；Automatic centering plate is between sleeve and load sensor, and the other end of automatic centering plate is provided with the location rim of the mouth suitable with described boss, and the outside of automatic centering plate is placed in the first endoporus of positioning sleeve, and sleeve is placed in the second endoporus of positioning sleeve；The frusto-conical chuck being combined into by 3 pieces of grip blocks being uniformly distributed circumferentially matches with sleeve, the inner surface of sleeve matches with the taper seat of chuck, the center of chuck has clamping hole, the inner surface in clamping hole is provided with anti-skidding rib, the end of the larger diameter end of grip block is provided with draw-in groove, in draw-in groove, inserting spring card or O can avoid each grip block of chuck to scatter, it is simple to management and entirety pick and place；The other end of sleeve is threaded clamp nut, and the inner face of clamp nut is pressed against the end of grip block larger diameter end, and clamp nut is provided with the diameter centre bore more than sample external diameter；Automatic centering plate is provided with the diameter external diameter more than sample and the centre bore more than grip block smaller diameter end external diameter；First endoporus of positioning sleeve and the second female coaxial, the diameter of the first endoporus is more than the diameter of the second endoporus, the external diameter of sleeve is less than the diameter of the second endoporus, the external diameter of automatic centering plate is less than the diameter of the first endoporus, and the degree of depth of the second endoporus is more than the height of load sensor boss and the thickness sum of automatic centering plate；The sidewall of positioning sleeve is provided with spline pin through hole, and sleeve is correspondingly provided with spline pin blind hole, and spline pin can be inserted in spline pin blind hole through spline pin through hole；Having protective jacket away from the wall outer surface of its first endoporus is threaded on positioning sleeve, protective jacket is provided with the diameter centre bore more than sample external diameter.
The work process of the present embodiment is as follows:
Before starting test, in sleeve 4, it is coated with mould oil when chuck is installed prevents grip block 3 clamping stagnation, it is inserted into spline pin 6 at the spline pin through hole 14 of positioning sleeve 5 and the spline pin blind hole 21 of sleeve 4, sample is inserted in the clamping hole 11 of chuck, then clamp nut 2 is screwed on sleeve 4, make clamp nut 4 compression clamping block 3, then transfer to spline pin 6；Protective jacket 1 is screwed on positioning sleeve 5, test can be proceeded by.
Claims (9)
1. the fixture on horizontal the steel strand relaxation test machine, the frusto-conical chuck including the load sensor being connected on fixed cross beam, being combined into by least two pieces of grip blocks and the sleeve matched with this chuck, the inner surface of sleeve matches with the taper seat of chuck, the center of chuck has clamping hole, the inner surface in clamping hole is provided with anti-skidding rib, it is characterized in that: be provided with automatic centering plate between described sleeve and load sensor, the ball-and-socket that one end of automatic centering plate is provided with indent is suitable with the spherical outside surface that sleeve one end is correspondingly arranged；The other end of sleeve is threaded clamp nut, and the inner face of clamp nut is pressed against the end of grip block larger diameter end, and clamp nut is provided with the diameter centre bore more than sample external diameter；Automatic centering plate is provided with the diameter external diameter more than sample and the centre bore more than grip block smaller diameter end external diameter；The outside of automatic centering plate is placed in the first endoporus of positioning sleeve, and sleeve is placed in the second endoporus of positioning sleeve；Positioning sleeve is fixed on fixed cross beam.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 1, it is characterised in that: the end that is stressed of described load sensor is with boss, and the other end of described automatic centering plate is provided with the location rim of the mouth suitable with this boss.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 1, it is characterized in that: the sidewall of described positioning sleeve is provided with spline pin through hole, being correspondingly provided with spline pin blind hole on sleeve, spline pin can be inserted in spline pin blind hole through spline pin through hole.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 1, it is characterised in that: having protective jacket away from the wall outer surface of its first endoporus is threaded on described positioning sleeve, protective jacket is provided with the diameter centre bore more than sample external diameter.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 1, it is characterised in that: the end of the larger diameter end of described grip block is provided with draw-in groove.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 1, it is characterised in that: described grip block is three, is uniformly distributed circumferentially.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 1, it is characterised in that: the first endoporus of described positioning sleeve and the second female coaxial, the diameter of the first endoporus is more than the diameter of the second endoporus；The external diameter of described sleeve is less than the diameter of the second endoporus；The external diameter of described automatic centering plate is less than the diameter of the first endoporus.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 2, it is characterised in that: the degree of depth of described second endoporus is more than the height of load sensor boss and the thickness sum of automatic centering plate.
Fixture on horizontal the steel strand relaxation test machine the most according to claim 1, it is characterized in that: described positioning sleeve has one end of the first endoporus and is provided with outer boss flange, outer boss flange is provided with through hole corresponding with the installing hole of load sensor, and load sensor and positioning sleeve are fixed on fixed cross beam by screw through the installing hole of this through hole and load sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620289519.0U CN205506555U (en) | 2016-04-10 | 2016-04-10 | A anchor clamps for on horizontal steel strand wires relaxation testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620289519.0U CN205506555U (en) | 2016-04-10 | 2016-04-10 | A anchor clamps for on horizontal steel strand wires relaxation testing machine |
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| Publication Number | Publication Date |
|---|---|
| CN205506555U true CN205506555U (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620289519.0U Active CN205506555U (en) | 2016-04-10 | 2016-04-10 | A anchor clamps for on horizontal steel strand wires relaxation testing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806702A (en) * | 2016-04-10 | 2016-07-27 | 济南天辰试验机制造有限公司 | Clamp used for horizontal relaxation testing machine of steel strands |
| CN112255089A (en) * | 2020-11-10 | 2021-01-22 | 中国矿业大学(北京) | Card formula minor diameter reinforcing bar tensile fixture and clamping structure |
| CN114486538A (en) * | 2022-04-02 | 2022-05-13 | 深圳市盛业建筑科技(集团)有限公司 | Anti-pulling test measuring device for foundation pit anchor rod |
-
2016
- 2016-04-10 CN CN201620289519.0U patent/CN205506555U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806702A (en) * | 2016-04-10 | 2016-07-27 | 济南天辰试验机制造有限公司 | Clamp used for horizontal relaxation testing machine of steel strands |
| CN105806702B (en) * | 2016-04-10 | 2018-09-18 | 济南天辰试验机制造有限公司 | For the fixture on horizontal the steel strand relaxation test machine |
| CN112255089A (en) * | 2020-11-10 | 2021-01-22 | 中国矿业大学(北京) | Card formula minor diameter reinforcing bar tensile fixture and clamping structure |
| CN114486538A (en) * | 2022-04-02 | 2022-05-13 | 深圳市盛业建筑科技(集团)有限公司 | Anti-pulling test measuring device for foundation pit anchor rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Clamp used for horizontal relaxation testing machine of steel strands Effective date of registration: 20171107 Granted publication date: 20160824 Pledgee: Qi Shang bank, Limited by Share Ltd, Ji'nan branch Pledgor: Jinan Tianchen Testing Machine Manufacturing Co., Ltd. Registration number: 2017370000168 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181126 Granted publication date: 20160824 Pledgee: Qi Shang bank, Limited by Share Ltd, Ji'nan branch Pledgor: Jinan Tianchen Testing Machine Manufacturing Co., Ltd. Registration number: 2017370000168 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Clamp used for horizontal relaxation testing machine of steel strands Effective date of registration: 20181225 Granted publication date: 20160824 Pledgee: Qi Shang bank, Limited by Share Ltd, Ji'nan branch Pledgor: Jinan Tianchen Testing Machine Manufacturing Co., Ltd. Registration number: 2018370000231 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191220 Granted publication date: 20160824 Pledgee: Qi Shang bank, Limited by Share Ltd, Ji'nan branch Pledgor: Jinan Tianchen Testing Machine Manufacturing Co., Ltd. Registration number: 2018370000231 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |