CN204043835U - Bolt stress pick-up unit - Google Patents
Bolt stress pick-up unit Download PDFInfo
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- CN204043835U CN204043835U CN201420462601.XU CN201420462601U CN204043835U CN 204043835 U CN204043835 U CN 204043835U CN 201420462601 U CN201420462601 U CN 201420462601U CN 204043835 U CN204043835 U CN 204043835U
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Abstract
The utility model discloses a kind of bolt stress pick-up unit, comprising: central part, it has a central axis; Around multiple fixtures that the central axis of described central part is arranged, each fixture is provided with the sensor for contacting with the sidewall of nut to be detected; With described fixture multiple driving member one to one, one end of each driving member rotates with described central part and is connected, and the fixture that the other end of each driving member is corresponding with it is connected; Have with described fixture is multiple one to one the elastic component inwardly shrinking elastic potential energy, one end of each elastic component is connected with described central part, and the driving member that the other end of each elastic component is corresponding with it is connected.When using bolt stress pick-up unit described in the utility model to carry out bolt stress detection, can detect 6 sides of nut simultaneously, testing result has uniqueness, compared with carrying out the device that detects, can improve accuracy of detection with existing certain two side for nut.
Description
Technical field
The utility model relates to a kind of stress detection device, particularly a kind of bolt stress pick-up unit.
Background technology
In the field such as oil, petrochemical industry, the connected mode that it is a kind of pipeline that flange bolt connects, equipment is conventional, as oil-gas mining, collect defeated industrial with refinery in each equipment connection mostly adopt flange bolt to be connected, connect and the effect sealed to reach.When using Flange joint, the end face of mutual two ring flanges of coupling being provided with sealed groove, in described sealed groove, being provided with metal o-ring, two ring flanges be circumferentially evenly provided with multiple bolt.Ring flange connects the pretightning force compression metal o-ring mainly relying on described bolt, to reach sealing effectiveness.Such as flange bolt is mostly adopted to be connected for the dark gas well in oil field and the equipment connection in ultra-deep gas well.Because described well depth is comparatively dark, up to hundred MPas, if failure event such as flange bolt connection gets loose, fractures, then very likely there is major accident in the equipment pressure of its correspondence.Therefore in order to ensure the reliability that flange bolt connects, all need to carry out stress mornitoring to it.
A kind of flange seal detection method based on Magnetic Memory, pick-up unit and detection system disclosed in the Chinese patent instructions CN102338683A announced for 2012 02 year 01 day.Described pick-up unit is according to metal magnetic memory detection technology, the hardware stray field information under the geomagnetic field action of pickup metal surface will be utilized, be applied in the detection remittance of flange bolt stress according to the principle of the stress distribution situation of Distribution of Magnetic Field situation determination metal parts.Namely it make use of between flange bolt magnetic memory signal and axial stress in bolt in essence has good linear relationship.
Above-mentioned flange seal pick-up unit is fixture pattern, during use, can only clamp certain two side of nut simultaneously.But because ring flange is under the effect of bolt pretightening, small distortion can occur, thus six of nut is not uniform contact between side and flange, generally can produce the stress differed in size on six sides of nut.If only estimate the size of final bolt stress according to the stress of the bolt that certain two side obtains, then often and between bolt true stress there is larger error.
Utility model content
The purpose of this utility model is to provide a kind of bolt stress pick-up unit, to improve bolt stress accuracy of detection.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
A kind of bolt stress pick-up unit, comprising: central part, it has a central axis; Around multiple fixtures that the central axis of described central part is arranged, each fixture is provided with the sensor for contacting with the sidewall of nut to be detected; With described fixture multiple driving member one to one, one end of each driving member rotates with described central part and is connected, and the fixture that the other end of each driving member is corresponding with it is connected; Have with described fixture is multiple one to one the elastic component inwardly shrinking elastic potential energy, one end of each elastic component is connected with described central part, and the driving member that the other end of each elastic component is corresponding with it is connected.
In a preferred embodiment, the transverse width of described fixture is not more than the transverse width of nut side to be detected, and bottom surface and the bottom surface of described fixture of described sensor flush and to contact for the root with nut.
In a preferred embodiment, described central part comprise the 3rd body for being connected with described driving member and from described 3rd body lower surface to the center-pole of downward-extension; Described 3rd body is six prisms of hollow, and described center-pole is positioned on the central axis of described central part.
In a preferred embodiment, describedly also comprise bolt stress pick-up unit first web member, described first web member is between described fixture and driving member, and its one end is slidably connected with described fixture; The other end is connected with described driving member.
In a preferred embodiment, the sidewall that described first web member coordinates with described fixture is provided with at least one pair of projection extending longitudinally and chute.
In a preferred embodiment, described driving member comprises at least one connecting rod, when described connecting rod is two, described two length of connecting rods are equal, upper and lower parallel distribution, after the two ends of described connecting rod are connected with described central part, fixture respectively, the parallelogram driving member that composition is coplanar with the central axis of described central part.
In a preferred embodiment, described driving member rotates with described fixture and is connected.
In a preferred embodiment, described elastic component is spring, and its one end be connected with described driving member is near described fixture.
In a preferred embodiment, described driving member also comprises the lower locking cap for being carried out detachably or partly removably connecting in the lower end of described driving member and described fixture and is used for the upper locking cap that carried out in the upper end of described driving member and described central part detachably or partly removably connecting.
In a preferred embodiment, described bolt stress pick-up unit is also connected with data acquisition system (DAS) by data line, described data acquisition system (DAS) comprises and the voltage signal of the sensor transmissions of acquisition is converted to digital signal acquiring card, digital signal is carried out the treating apparatus that accesses and analyze, and described treating apparatus comprises for the access unit of digital signal and the analytic unit for analyzing digital signal.
Feature of the present utility model and advantage are: when carrying out bolt stress detection owing to using bolt stress pick-up unit described in the utility model, 6 sides of nut are detected simultaneously, testing result has uniqueness, compared with carrying out with existing certain two side for nut the device that detects, accuracy of detection can be improved.Secondly bolt stress pick-up unit described in the utility model, is located by elastic restraint power between described driving member and fixator, causes between detection agency and detected nut and be easy to fit and depart from, easy to operate.Again because the detection agency in bolt stress pick-up unit described in the utility model has Telescopic, detection agency can be fitted completely with the root of detected nut, detect multiplicity high.In addition, at engineering site, the flange bolt of usual equipment connects to be arranged closely, and leave the limited space of nut sensor installation for, and the bright described bolt stress structure of the detecting device of this law is compact, shared space is little, practical.
Accompanying drawing explanation
Fig. 1 is the front view of a kind of bolt stress pick-up unit in the utility model embodiment;
Fig. 2 is the vertical view of a kind of bolt stress pick-up unit in the utility model embodiment;
Fig. 3 is the front view of a kind of bolt stress pick-up unit fixture in the utility model embodiment;
Fig. 4 is the vertical view of a kind of bolt stress pick-up unit fixture in the utility model embodiment;
Fig. 5 is the front view that in the utility model embodiment, a kind of bolt stress pick-up unit fixture and the first web member coordinate;
Fig. 6 is the vertical view that in the utility model embodiment, a kind of bolt stress pick-up unit fixture and the first web member coordinate;
Fig. 7 is the structural representation of a kind of bolt stress pick-up unit driving member in the utility model embodiment;
Fig. 8 is the structural representation of locking cap under a kind of bolt stress pick-up unit in the utility model embodiment;
Fig. 9 is a kind of bolt stress pick-up unit bolt stress Test Field arrangenent diagram in the utility model embodiment;
Figure 10 is flange seal pick-up unit bolt stress testing result figure in prior art;
Figure 11 uses a kind of bolt stress pick-up unit of the utility model bolt stress testing result figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is elaborated, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen in the application's claims limited range.
A kind of bolt stress pick-up unit of the utility model, for improving bolt stress accuracy of detection.
Refer to Fig. 1 and Fig. 2, be front view and the vertical view of a kind of bolt stress pick-up unit of the utility model, it comprises: fixture 1, driving member 2, central part 3, elastic component 4.
Wherein said fixture 1 is mainly used in sensor installation.Described sensor is Magnetic Memory sensor.The quantity of described fixture 1 is identical with the number of nut side.After described fixture 1 is provided with Magnetic Memory sensor, contact with each sidewall of nut.
Refer to Fig. 3 and Fig. 4, wherein Fig. 3 is the front view of bolt stress pick-up unit fixture in the utility model embodiment, and Fig. 4 is the vertical view of bolt stress pick-up unit fixture in the utility model embodiment.
Described fixture 1 is provided with the first noumenon 101 extending longitudinally.Described the first noumenon 101 can be I-shaped die or H type on the whole can also be other shapes.Described the first noumenon 101 is provided with the first groove 102, and described first groove 102 is for providing the installing space of Magnetic Memory sensor.Described Magnetic Memory sensor is fixed in described first groove 102, and its fixing mode can be mode or other modes of stickup, only need ensure the fastness of fixing.Described first groove 102 in the vertical can be through.Described the first noumenon 101 transverse width is not more than the transverse width of a nut side to be detected.One end of described Magnetic Memory sensor flushes with one end of described fixture 1.When the sidewall contact of described fixture 1 with nut, to be conducive to describedly to contact with the root of nut with the Magnetic Memory sensor that fixture 1 one end flushes.Due to root and the flange contact of described nut, its electromagnetic signal is strong away from root side relative to described, when described Magnetic Memory sensor is positioned at the root of described nut, is conducive to stronger signal being detected.
Described fixture 1 also comprises: the first web member 11.Refer to Fig. 5 and Fig. 6, wherein Fig. 5 is the front view that in the utility model embodiment, bolt stress pick-up unit fixture and the first web member coordinate, and Fig. 6 is the vertical view that in the utility model embodiment, bolt stress pick-up unit fixture and the first web member coordinate.
Described first web member 11 1 aspect is used for and described fixture 1 coordinates, and realizes whole fixture 1 scalable in the vertical, is used on the other hand being connected with driving member 2.Described first web member 11 is provided with the second body 111 extending longitudinally.Described first web member 11 can be I-shaped die or H type on the whole can also be other shapes.Described first web member 11 is provided with the second groove 112, and described second groove 112 is for arranging described fixture 1.In the position that described first web member 11 mates with described fixture 1, be correspondingly provided with at least one pair of chute extending longitudinally and projection, so that realize between described first web member 11 and described fixture 1 can relative sliding, namely formed and be slidably connected.As shown in Figure 6, can be provided with a projection 113 on the madial wall of described first web member 11, described protruding 113 can semicircular in shape.Correspondingly on the lateral wall of described fixture 1, be provided with chute 103, described chute 103 also can semicircular in shape.Described protruding 113 and the shape of chute 103 can also be other shape, only need ensure that both can mate mutually.Described protruding 113 can be fixed by the mode of welding and described first web member 11.Same in addition, also chute can be set on the madial wall of described first web member 11, the lateral wall of described fixture 1 arranges projection.When nut specification to be detected is different, the longitudinal thickness of its nut is also unequal, now, can be as required, first web member 11 and fixture 1 being carried out relative sliding, to regulate the length of whole fixture 1, thus ensureing that described fixture 1 is when detecting the nut of different size, all the time can both touch the root of nut, thus be conducive to stronger signal being detected.
Referring to Fig. 7, is the structural representation of bolt stress pick-up unit driving member in the utility model embodiment.Wherein said driving member 2 comprises at least one connecting rod 201, and one end of described connecting rod 201 is connected with described central part 3, the other end is connected with described fixture 1.The quantity of described connecting rod 201 can be two, and its length can be equal.The connecting rod 201 that described two length are equal can upper and lower parallel distribution.After described connecting rod 201 is connected with described central part 3 and fixture 1, the parallelogram connection-rod coplanar with the central axis of described central part 3 can be formed.When described connecting rod 201 consists of parallelogram connection-rod, in the plane at described connecting rod 201 place, described connecting rod 201 can drive the detection agency be attached thereto to remain on vertical position and rotate.
Described driving member 2 can also comprise: lower locking cap 202 and upper locking cap 203.Described lower locking cap 202 is arranged between described connecting rod 201 and fixture 1; Fixed cap 202 is arranged between described connecting rod 201 and central part 3, is conducive to the installation and removal of whole device by arranging described lower locking cap 202 and upper locking cap 203.
Referring to Fig. 8, is the structural representation of locking cap under bolt stress pick-up unit in the utility model embodiment.Described lower locking cap 202 can be U-shaped, and it is provided with the first side wall 2021 and the second relative sidewall 2022, and for being connected and fixed the roof 2023 of described the first side wall 2021 and the second sidewall 2022.Described second sidewall 2022 is connected by half removably or removably with one end of described connecting rod 201, such as, can be chain connection.As shown in Figure 7, described lower locking cap 202 can also be provided with rivet 204.Described rivet 204 can specifically be arranged on the first side wall 2021 of described lower locking cap 202.When described the first side wall 2021 is provided with rivet 204, correspondingly, described fixture 1 is provided with the rivet hole matched with described rivet 204.Such as the back side of the second groove 112 of the first web member 11 of described fixture 1 can be provided with rivet hole, be fixedly connected with by rivet with described fixture 1 to make described driving member 2.The mode that described rivet is fixedly connected with also can be fixedly connected with for screw thread.When being fixedly connected with for screw thread, described rivet 204 replaces with bolt or screw, and described rivet hole is corresponding replaces with the threaded hole matched with described bolt or screw.In addition, the mode that can also be fixedly connected with for other.Be provided with hinge between second sidewall 2022 of described lower locking cap 202 and described connecting rod 201, after described connecting rod 201 is connected through the hinge with fixed cap 202, can realize relatively rotating.
Fixed cap 203 is arranged between described connecting rod 201 and central part 3.The shape and structure of fixed cap 203 can consistent with fixed cap 202.The side of fixed cap 203 is connected by hinged and described connecting rod 201, similarly, after described connecting rod 201 is connected through the hinge with fixed cap 203, can realize relatively rotating.The opposite side of fixed cap 203 is fixedly connected with central part 3 by half removablies such as riveting, be threaded or removably.
Refer to Fig. 1 and Fig. 2, described central part 3 coordinates with described elastic component 4, for connecting and locating described driving member 2.
Described central part 3, it comprises the 3rd body 30, and it has a central axis.That described 3rd body 30 can be hollow and centrosymmetric positive six prisms, or other shapes.Such as when described 3rd body 30 is positive six prism, its six sides are connected to driving member 2, corresponding with six sidewalls of nut to be detected.At the lower surface extended center-pole 31 had for fixing described elastic component 4 downwards of described 3rd body 30.The sidewall of described center-pole 31 is fixed with described elastic component 4.
Described elastic component 4 has the elastic potential energy of inwardly shrinking.Concrete described elastic component 4 can be spring, or other have flexible parts.One end of described elastic component 4 is connected with described driving member 2, and the other end is connected with described center-pole 31.Because described elastic component 4 has the elastic potential energy of inwardly shrinking, therefore when described elastic component 4 is connected with described driving member 2 and center-pole 31, described driving member 2 can be driven to shrink to described center-pole 31 direction, by the constraining force of described elastic component 4, the fixture 1 be connected can be close to the sidewall of nut with described driving member 2.The number of described elastic component 4 is six, matches with the number of described driving member 2.
During use, can rotate the driving member 2 of described parallelogram, drive the described elastic component 4 be attached thereto to stretch out, now, described fixture 1 increases relative to the distance of center-pole 31, thus can realize detecting more large gauge nut.
Referring to Fig. 9, is a kind of bolt stress pick-up unit bolt stress Test Field arrangenent diagram in the utility model embodiment.During detection, bolt stress pick-up unit the utility model being included fixture 1, driving member 2, central part 3 and elastic component 4 is arranged on nut 5 to be detected, and described bolt stress pick-up unit connects a data acquisition system (DAS) 6 by data line.Described data acquisition system (DAS) 6 comprises capture card and treating apparatus.Described treating apparatus comprises for the access unit of digital signal and the analytic unit for analyzing digital signal.The magnetic memory signal of described nut 5 is obtained by described data acquisition system (DAS) 6, the voltage signal of the Magnetic Memory sensor transmissions of acquisition is converted to digital signal by wherein said capture card, then the access unit of digital data transmission to treating apparatus is accessed, analyzed by the analytic unit of described treating apparatus, thus realize the collection of nut 5 magnetic memory signal, access and analysis.In use, single the utility model device can be used to carry out the detection one by one of flange bolt stress, multiple the utility model device also can be used to carry out the synchronous detection of whole flange bolt stress.
As shown in Figure 10, be flange seal pick-up unit bolt stress testing result figure in prior art.Wherein ordinate represents the amplitude increment of the voltage signal of Magnetic Memory sensor transmissions, and unit is volt; Horizontal ordinate represents the tensile force of bolt, and unit is thousand Ns.During test, carry out measuring respectively at the not ipsilateral of described nut.
Can find out with reference to Figure 10, in prior art, be detect for certain two side of nut during owing to measuring, and when the position detected is different, each testing result is also not quite identical, and test findings has suitable error.Therefore, only according to the voltage signal of the Magnetic Memory sensor transmissions on certain two side of nut, the bolt stress calculated can there are differences with truth.
As shown in figure 11, be use a kind of bolt stress pick-up unit of the utility model bolt stress testing result figure.Wherein ordinate represents the amplitude increment of the voltage signal of Magnetic Memory sensor transmissions, and unit is volt; Horizontal ordinate represents the tensile force of bolt, and unit is thousand Ns.
When using bolt stress pick-up unit described in the utility model to carry out bolt stress detection, can detect 6 sides of nut simultaneously.
Can find out with reference to Figure 11, when carrying out bolt stress detection owing to using bolt stress pick-up unit described in the utility model, 6 sides of nut are detected simultaneously, testing result has uniqueness, compared with carrying out with existing certain two side for nut the device that detects, accuracy of detection can be improved.
Can find out that magnetic memory signal amplitude and tensile force have stronger linear relationship with reference to Figure 11 in addition.Test findings shows: bolt shaft to Magnetic Memory voltage signal U and bolt tensile stress sigma linear;
Its general formula is: U=A σ+B
Wherein, coefficient A is linear equation slope, and this value is relevant with bolt material, records through test; Coefficient B is linear equation intercept, and this value is approximately equal to the magnetic memory signal value under bolt zero-load conditions, and unit is volt.
Demonstrate when detecting at the scene, by selecting material properties matter and the bolt stress value that detects can being obtained according to the Magnetic Memory voltage signal obtained.
Relative to existing pick-up unit, bolt stress pick-up unit described in the utility model is except having accuracy of detection height, due to six side all close contacts of itself and nut, for the pick-up unit of existing clamping two sides, more can resist the interference of external force, when detecting, the accident of getting loose is less likely to occur.
Secondly its central part 3 of bolt stress pick-up unit described in the utility model has reducing function, the distance of described fixture 1 relative to center-pole 31 can be changed as required, therefore a set of bolt stress pick-up unit described in the utility model can realize the stress mornitoring of all steel bolts between M12 to M52 specification, the stress mornitoring of most bearing device flange bolt can be met, what avoid device repeats making, thus is conducive to the reduction of testing cost.
Again because the fixture 1 in bolt stress pick-up unit described in the utility model has Telescopic, fixture 1 can be fitted completely with the root of detected nut, detect multiplicity high.
In addition bolt stress pick-up unit described in the utility model, is located by elastic restraint power between described driving member 2 and central part 3, causes between fixture 1 and detected nut and is easy to fit and depart from, easy to operate.
At engineering site, the flange bolt of usual equipment connects to be arranged closely, and leave the limited space of nut sensor installation for, and the bright described bolt stress structure of the detecting device of this law is compact, shared space is little, practical.
The foregoing is only several embodiment of the present utility model, although the embodiment disclosed by the utility model as above, the embodiment that described content just adopts for the ease of understanding the utility model, is not intended to limit the utility model.Any the utility model person of ordinary skill in the field; under the prerequisite not departing from the spirit and scope disclosed by the utility model; any amendment and change can be done on the formal of embodiment and details; but scope of patent protection of the present utility model, the scope that still must define with appended claims is as the criterion.
Claims (10)
1. a bolt stress pick-up unit, is characterized in that, comprising:
Central part, it has a central axis;
Around multiple fixtures that the central axis of described central part is arranged, each fixture is provided with the sensor for contacting with the sidewall of nut to be detected;
With described fixture multiple driving member one to one, one end of each driving member rotates with described central part and is connected, and the fixture that the other end of each driving member is corresponding with it is connected;
Have with described fixture is multiple one to one the elastic component inwardly shrinking elastic potential energy, one end of each elastic component is connected with described central part, and the driving member that the other end of each elastic component is corresponding with it is connected.
2. bolt stress pick-up unit as claimed in claim 1, it is characterized in that: the transverse width of described fixture is not more than the transverse width of nut side to be detected, bottom surface and the bottom surface of described fixture of described sensor flush and to contact for the root with nut.
3. bolt stress pick-up unit as claimed in claim 1, is characterized in that: described central part comprise the 3rd body for being connected with described driving member and from described 3rd body lower surface to the center-pole of downward-extension; Described 3rd body is six prisms of hollow, and described center-pole is positioned on the central axis of described central part.
4. bolt stress pick-up unit as claimed in claim 1, it is characterized in that: also comprise the first web member, described first web member is between described fixture and driving member, and its one end is slidably connected with described fixture; The other end is connected with described driving member.
5. bolt stress pick-up unit as claimed in claim 4, is characterized in that: the sidewall that described first web member coordinates with described fixture is provided with at least one pair of projection extending longitudinally and chute.
6. bolt stress pick-up unit as claimed in claim 1, it is characterized in that: described driving member comprises at least one connecting rod, when described connecting rod is two, described two length of connecting rods are equal, upper and lower parallel distribution, after the two ends of described connecting rod are connected with described central part, fixture respectively, the parallelogram driving member that composition is coplanar with the central axis of described central part.
7. bolt stress pick-up unit as claimed in claim 1, is characterized in that: described driving member rotates with described fixture and is connected.
8. bolt stress pick-up unit as claimed in claim 1, it is characterized in that: described elastic component is spring, its one end be connected with described driving member is near described fixture.
9. bolt stress pick-up unit as claimed in claim 1, it is characterized in that, described driving member also comprises the lower locking cap for being carried out detachably or partly removably connecting in the lower end of described driving member and described fixture and is used for the upper locking cap that carried out in the upper end of described driving member and described central part detachably or partly removably connecting.
10. bolt stress pick-up unit as claimed in claim 1, it is characterized in that: described bolt stress pick-up unit is also connected with data acquisition system (DAS) by data line, described data acquisition system (DAS) comprises and the voltage signal of the sensor transmissions of acquisition is converted to digital signal acquiring card, digital signal is carried out the treating apparatus that accesses and analyze, and described treating apparatus comprises for the access unit of digital signal and the analytic unit for analyzing digital signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420462601.XU CN204043835U (en) | 2014-08-15 | 2014-08-15 | Bolt stress pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420462601.XU CN204043835U (en) | 2014-08-15 | 2014-08-15 | Bolt stress pick-up unit |
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| CN204043835U true CN204043835U (en) | 2014-12-24 |
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| CN201420462601.XU Expired - Fee Related CN204043835U (en) | 2014-08-15 | 2014-08-15 | Bolt stress pick-up unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198106A (en) * | 2014-08-15 | 2014-12-10 | 中国石油天然气集团公司 | Bolt stress detecting device |
| CN109648491A (en) * | 2018-12-24 | 2019-04-19 | 内蒙古北方重型汽车股份有限公司 | Torque checks auxiliary device |
-
2014
- 2014-08-15 CN CN201420462601.XU patent/CN204043835U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198106A (en) * | 2014-08-15 | 2014-12-10 | 中国石油天然气集团公司 | Bolt stress detecting device |
| CN109648491A (en) * | 2018-12-24 | 2019-04-19 | 内蒙古北方重型汽车股份有限公司 | Torque checks auxiliary device |
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Granted publication date: 20141224 |