CN105865665B - A kind of the preload force measuring method and device of flared fitting - Google Patents
A kind of the preload force measuring method and device of flared fitting Download PDFInfo
- Publication number
- CN105865665B CN105865665B CN201610181811.5A CN201610181811A CN105865665B CN 105865665 B CN105865665 B CN 105865665B CN 201610181811 A CN201610181811 A CN 201610181811A CN 105865665 B CN105865665 B CN 105865665B
- Authority
- CN
- China
- Prior art keywords
- length
- temperature
- cap nut
- flared fitting
- moment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000036316 preload Effects 0.000 title claims abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 65
- 238000005259 measurement Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 17
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000005483 Hooke's law Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/04—Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention provides the preload force measuring method and device of a kind of flared fitting, wherein method includes: the acoustic signals for obtaining piezoelectric ceramic piece and being generated according to voltage signal, and voltage signal is the voltage signal applied using piezoelectric ceramic piece of the sound wave generation/receiver to the cap nut one end for being located at flared fitting；Obtain first length of the cap nut measured according to acoustic signals before flared fitting assembly, and the second length after flared fitting assembly；According to the difference of the second length and the first length, the change of cap nut length caused by temperature change, and the coefficient of elasticity being obtained ahead of time, obtain the pretightning force of flared fitting.The problem of present invention is the assembly of flared fitting, the monitoring of pretightning force provides a kind of technological means in debugging and work, solves in the prior art since that structure is complicated is compact for pipe fitting, is unable to measure the pretightning force of flared fitting.
Description
Technical field
The present invention relates to the preload force measuring method of mechanical engineering technical field more particularly to a kind of flared fitting and
Device.
Background technique
Flared fitting have the characteristics that it is compact-sized, be convenient to mount and dismount, in fields such as aerospace, vehicle, ships
It is widely used in pipe-line system.In engineer application, the axial pre tightening force that assembling stage provides has pipe seal performance
Vital influence.If the axial pre tightening force applied is too small, the contact stress that will lead to sealing area is insufficient, can not achieve
Effective sealing；And if being applied with excessive axial pre tightening force, contact stress can be more than the utmost carrying ability of material, and then destroy
Sealing structure leads to the generation of leakage.So axial pre tightening force must be controlled a certain for the pipe fitting of disposable type
In a reasonable range, reliable sealing performance just can guarantee.
Although the pretightning force of flared fitting is critically important, in engineer application, since structure is complicated for pipe fitting
And it is compact, also it is unable to measure the pretightning force of flared fitting.As shown in Figure 1, flared fitting is by cap nut 1, pipe sleeve
2, flared tube 3 and pipe fitting 4 form, compact-sized, can not measure pretightning force by clamping sensor.Simultaneously as its
External cap nut is in irregular shape, and the deformation for causing it to generate in stress is uneven, it is difficult to by the side for pasting foil gauge
Formula carrys out precise measurement pretightning force, and the stickup of foil gauge is inconvenient, the real-time measurement not being suitable in engineering.
Summary of the invention
The preload force measuring method and device for being designed to provide a kind of flared fitting of the embodiment of the present invention, it is intended to
It solves the problem of in the prior art due to pipe fitting structure is complicated the compact pretightning force for being unable to measure flared fitting.
The embodiment of the present invention provides a kind of preload force measuring method of flared fitting, comprising:
The acoustic signals that piezoelectric ceramic piece is generated according to voltage signal are obtained, the voltage signal is sent out using sound wave
The voltage signal that life/receiver applies the piezoelectric ceramic piece of the cap nut one end for being located at the flared fitting；
Obtain the of cap nut measure according to the acoustic signals before the flared fitting assembles
One length, and it is second long after flared fitting assembly according to the cap nut of acoustic signals measurement
Degree；
According to the difference of second length and first length, the cap nut length caused by temperature change
Change, and the coefficient of elasticity being obtained ahead of time, obtains the pretightning force of the flared fitting.
Wherein, it is assembled in the flared fitting in the cap nut that acquisition is measured according to the acoustic signals
The first preceding length, and the cap nut measured according to the acoustic signals is after flared fitting assembly
When the second length, the method also includes:
The first temperature when measuring first length is detected using temperature sensor, and when measurement second length
Second temperature.
Wherein, the cap nut measured according to the acoustic signals that obtains is assembled in the flared fitting
The first length before, and the cap nut measured according to the acoustic signals is after flared fitting assembly
The second length, comprising:
Before flared fitting assembly, records the sound wave generation/receiver and the piezoelectric ceramic piece is applied
Add the first moment of a voltage signal；
It records the acoustic signals to be transmitted in the cap nut of first temperature, return when encountering air
And the second moment received by the sound wave generation/receiver；
When according to spread speed of the acoustic signals in the cap nut of first temperature with described second
The product with the half of the first moment difference is carved, first length is obtained；
After flared fitting assembly, records the sound wave generation/receiver and the piezoelectric ceramic piece is applied
Add the third moment of a voltage signal；
It records the acoustic signals to be transmitted in the cap nut of the second temperature, return when encountering air
And the 4th moment received by the sound wave generation/receiver；
When according to spread speed of the acoustic signals in the cap nut of the second temperature with the described 4th
The product with the half of the third moment difference is carved, second length is obtained.
Wherein, the cap nut measured according to the acoustic signals that obtains is assembled in the flared fitting
The first length before, and the cap nut measured according to the acoustic signals is after flared fitting assembly
The second length, comprising:
Before flared fitting assembly, records the sound wave generation/receiver and the piezoelectric ceramic piece is applied
Add the first moment of a voltage signal；
It records the acoustic signals to transmit in the air of first temperature, encounter positioned at the cap nut other end
Sound wave reverberation when return and the 5th moment for being received by the sound wave generation/receiver, wherein the piezoelectric ceramic piece
The cap nut is exposed to the sound wave reverberation；
According to spread speed of the acoustic signals in the air of first temperature and the 5th moment with it is described
The product of the half of first moment difference obtains first length；
After flared fitting assembly, records the sound wave generation/receiver and the piezoelectric ceramic piece is applied
Add the third moment of a voltage signal；
It records the acoustic signals to transmit in the air of the second temperature, encounter positioned at the cap nut other end
Sound wave reverberation when return and the 6th moment for being received by the sound wave generation/receiver；
According to spread speed of the acoustic signals in the air of the second temperature and the 6th moment with it is described
The product of the half of third moment difference obtains second length.
Wherein, the difference according to second length and first length, the housing caused by temperature change
The change of nut length, and the coefficient of elasticity being obtained ahead of time, obtain the pretightning force of the flared fitting, comprising:
The difference of second length and first length is added or subtracted is described as caused by temperature change
The variable quantity of cap nut length, resulting value are multiplied with the coefficient of elasticity, obtain the preload of the flared fitting
Power.
Wherein, the cap nut measured according to the acoustic signals that obtains is assembled in the flared fitting
The first length before, and the cap nut measured according to the acoustic signals is after flared fitting assembly
The second length when, the method also includes:
First temperature that first moment of record, second moment and detection are obtained, and record
The second temperature that the third moment, the 4th moment and detection obtain is transferred to a terminal device, and at the end
It is shown in end equipment.
Wherein, the cap nut measured according to the acoustic signals that obtains is assembled in the flared fitting
The first length before, and the cap nut measured according to the acoustic signals is after flared fitting assembly
The second length when, the method also includes:
First temperature that first moment of record, the 5th moment and detection are obtained, and record
The second temperature that the third moment, the 6th moment and detection obtain is transferred to a terminal device, and at the end
It is shown in end equipment.
The embodiment of the present invention also provides a kind of pretightening force measuring apparatus of flared fitting, comprising:
Piezoelectric ceramic piece positioned at cap nut one end of flared fitting；
Sound wave generation/receiver being connect with the piezoelectric ceramic piece, applying voltage signal for the piezoelectric ceramic piece；
And
Be arranged in it is on the cap nut, detection temperature temperature sensor and connect with the temperature sensor,
Compare the temperature detector of the temperature value of acquisition.
Wherein, the piezoelectric ceramic piece is set to the bottom surface of described cap nut one end, Nian Jie with the cap nut.
Wherein, the both ends of the cap nut are respectively arranged with the first fixture and the second fixture, and first fixture and
Second fixture exposes to the cap nut, and the piezoelectric ceramic piece clamping is on first fixture, second folder
Sound wave reverberation is provided on tool, the piezoelectric ceramic piece and the sound wave reverberation are opposite.
Wherein, the measuring device further include: with the sound wave generation/that receiver is connect, occur for the sound wave/connects
It receives device and the power supply of voltage is provided.
Wherein, the measuring device further include:
The terminal device being connect with the sound wave generation/receiver and the temperature detector.
The beneficial effect of the above embodiment of the present invention includes at least:
The embodiment of the present invention is by applying a voltage signal to the piezoelectric ceramic piece for being located at cap nut one end, so that piezoelectricity
Potsherd generates an acoustic signals, utilizes first length of the acoustic signals measurement cap nut before flared fitting assembly
Degree, then using acoustic signals measurement cap nut flared fitting assembly after the second length, according to the second length,
The difference of first length, the change and corresponding coefficient of elasticity of cap nut length caused by temperature change, calculating are expanded
The pretightning force of mouth formula pipe fitting.The embodiment of the present invention can be realized the pretightning force of real-time measurement flared fitting, be flared type
The monitoring of pretightning force provides a kind of technological means in the assembly of pipe fitting, debugging and work, solve in the prior art by
The problem of that structure is complicated is compact in pipe fitting, is unable to measure the pretightning force of flared fitting.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of flared fitting；
Fig. 2 is the preload force measuring method schematic diagram one of the flared fitting of the embodiment of the present invention；
Fig. 3 is the preload force measuring method schematic diagram two of the flared fitting of the embodiment of the present invention；
Fig. 4 is the preload force measuring method schematic diagram three of the flared fitting of the embodiment of the present invention；
Fig. 5 is the pretightening force measuring apparatus schematic diagram one of the flared fitting of the embodiment of the present invention；
Fig. 6 is the pretightening force measuring apparatus schematic diagram two of the flared fitting of the embodiment of the present invention.
Wherein in figure: 1, cap nut；2, pipe sleeve；3, flared tube；4, pipe fitting；5, piezoelectric ceramic piece；6, sound wave occur/
Receiver；7, power supply；8, the first fixture；9, the second fixture；10, sound wave reverberation；11, temperature sensor；12, temperature detection
Device；13, terminal device.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The embodiment of the present invention provides a kind of preload force measuring method of flared fitting, as shown in Figure 2, comprising:
S100, the acoustic signals that piezoelectric ceramic piece is generated according to voltage signal are obtained, voltage signal is sent out using sound wave
The voltage signal that life/receiver applies the piezoelectric ceramic piece of the cap nut one end for being located at flared fitting；
S200, first length of the cap nut measured according to acoustic signals before flared fitting assembly is obtained,
With the second length of the cap nut that is measured according to acoustic signals after flared fitting assembly；
S300, according to the difference of the second length and the first length, the change of cap nut length caused by temperature change, with
And the coefficient of elasticity being obtained ahead of time, obtain the pretightning force of flared fitting.
Specifically, before flared fitting assembly, using sound wave generation/receiver to positioned at cap nut one end
Piezoelectric ceramic piece applies a voltage signal, and piezoelectric ceramics sector-meeting generates an acoustic signals according to voltage signal.Utilize acoustic signals
The first length of the cap nut before flared fitting assembly can be measured.Then after flared fitting assembly,
One voltage signal, piezoelectric ceramics are applied again to the piezoelectric ceramic piece for being located at cap nut one end using sound wave generation/receiver
Sector-meeting generates an acoustic signals according to voltage signal.The housing after flared fitting assembly can be measured using acoustic signals
Second length of nut.
After the first length and flared fitting assembly of the cap nut before obtaining flared fitting assembly
Cap nut the second length after, calculate the second length and the first length difference, according to the second length and the first length
Difference, the change of cap nut length as caused by temperature change, and the coefficient of elasticity being obtained ahead of time can calculate and obtain
Obtain the pretightning force of flared fitting.
The embodiment of the present invention is by applying a voltage signal to the piezoelectric ceramic piece for being located at cap nut one end, so that piezoelectricity
Potsherd generates an acoustic signals, utilizes first length of the acoustic signals measurement cap nut before flared fitting assembly
Then degree measures second length of the cap nut after flared fitting assembly using acoustic signals, according to the second length
With the difference of the first length, the variable quantity of cap nut length as caused by temperature change and corresponding coefficient of elasticity, meter
Calculate the pretightning force for obtaining flared fitting.The embodiment of the present invention can be realized the pretightning force of real-time measurement flared fitting,
Monitoring for pretightning force in the assembly of flared fitting, debugging and work provides a kind of technological means, solves existing
Since that structure is complicated is compact for pipe fitting in technology, the problem of being unable to measure the pretightning force of flared fitting.
In the above embodiment of the present invention, as shown in figure 3, obtaining the cap nut measured according to acoustic signals in flared type
The first length before pipe fitting assembly, and the cap nut measured according to acoustic signals is after flared fitting assembly
The specific steps of second length include:
S201, flared fitting assembly before, using the first temperature of temperature sensor measurement cap nut, and remember
Sound recording wave generation/receiver applies the first moment of a voltage signal to piezoelectric ceramic piece；
S202, record acoustic signals are transmitted in the cap nut of the first temperature, are returned and when encountering air by sound
The second moment that wave generation/receiver receives；
S203, according to spread speed of the acoustic signals in the cap nut of the first temperature and the second moment and the first moment
The product of the half of difference obtains the first length；
S204, flared fitting assembly after, using the second temperature of temperature sensor measurement cap nut, and remember
Sound recording wave generation/receiver applies the third moment of a voltage signal to piezoelectric ceramic piece；
S205, record acoustic signals are transmitted in the cap nut of second temperature, are returned and when encountering air by sound
The 4th moment that wave generation/receiver receives；
S206, according to spread speed of the acoustic signals in the cap nut of second temperature and the 4th moment and third moment
The product of the half of difference obtains the second length.
Before flared fitting assembly, the first length of cap nut is measured, specifically:
One voltage signal is applied to piezoelectric ceramic piece using sound wave generation/receiver, at this time using temperature sensor measurement
First temperature of cap nut, and record the first moment for applying voltage signal, the piezoelectric ceramic piece positioned at cap nut one end
An acoustic signals are generated according to voltage signal, acoustic signals are transmitted in the cap nut of the first temperature, outer being transmitted to
Cover the other end of nut, return when encountering air.Sound wave generation at this time/receiver can receive the acoustic signals of return, and remember
Sound recording wave generation/receiver receives the second moment of the acoustic signals returned.It, can according to the difference at the second moment and the first moment
To obtain the duration that acoustic signals transmit in cap nut, according to propagation of the acoustic signals in the cap nut of the first temperature
Speed and acoustic signals transmit the product of the half of duration in cap nut, can obtain cap nut in flared type pipe
The first length before connector assembly.
After flared fitting assembly, the second length of cap nut is measured, specifically:
One voltage signal is applied to piezoelectric ceramic piece using sound wave generation/receiver, at this time using temperature sensor measurement
The second temperature of cap nut, and record the third moment for applying voltage signal, the piezoelectric ceramic piece positioned at cap nut one end
An acoustic signals are generated according to voltage signal, acoustic signals are transmitted in the cap nut of second temperature, outer being transmitted to
Cover the other end of nut, return when encountering air.Sound wave generation at this time/receiver can receive the acoustic signals of return, and remember
Sound recording wave generation/receiver receives the 4th moment of the acoustic signals returned.It, can according to the difference at the 4th moment and third moment
To obtain the duration that acoustic signals transmit in cap nut, according to propagation of the acoustic signals in the cap nut of second temperature
Speed and acoustic signals transmit the product of the half of duration in cap nut, can obtain cap nut in flared type pipe
The second length after connector assembly.
In the above embodiment of the present invention, as shown in figure 4, obtaining the cap nut measured according to acoustic signals in flared type
The first length before pipe fitting assembly, and the cap nut measured according to acoustic signals is after flared fitting assembly
The specific steps of second length further include:
S210, before flared fitting assembly, using the first temperature of temperature sensor measurement air, and record sound
Wave generation/receiver applies the first moment of a voltage signal to piezoelectric ceramic piece；
S211, record acoustic signals transmit in the air of the first temperature, encounter the sound wave positioned at the cap nut other end
It is returned when reverberation and the 5th moment for being received by sound wave generation/receiver, wherein piezoelectric ceramic piece harmony wave reflection beyond the region of objective existence
It is exposed to cap nut；
S212, spread speed and the 5th moment and the first moment difference according to acoustic signals in the air of the first temperature
Half product, obtain the first length；
S213, after flared fitting assembly, using the second temperature of temperature sensor measurement air, and record sound
Wave generation/receiver applies the third moment of a voltage signal to piezoelectric ceramic piece；
S214, record acoustic signals transmit in the air of second temperature, encounter the sound wave positioned at the cap nut other end
The 6th moment for returning when reverberation and being received by sound wave generation/receiver；
S215, spread speed and the 6th moment and third moment difference according to acoustic signals in the air of second temperature
Half product, obtain the second length.
Before flared fitting assembly, the first length of cap nut is measured, specifically:
One voltage signal is applied to piezoelectric ceramic piece using sound wave generation/receiver, at this time using temperature sensor measurement
First temperature of air, and the first moment for applying voltage signal is recorded, positioned at cap nut one end and expose to cap nut
Piezoelectric ceramic piece one acoustic signals are generated according to voltage signal, acoustic signals are transmitted in the air of the first temperature,
The other end for being transmitted to cap nut encounters return when positioned at the sound wave reverberation of the cap nut other end, wherein sound wave reverberation
Also cap nut is exposed to, and sound wave reverberation is opposite with piezoelectric ceramic piece.Sound wave generation at this time/receiver can receive return
Acoustic signals, and record the 5th moment that sound wave generation/receiver receives the acoustic signals returned.According to the 5th moment and the
The difference at one moment can obtain the aerial transmitting duration of acoustic signals, according to acoustic signals the first temperature air
In spread speed and acoustic signals transmit in air duration half product, cap nut can be obtained and be flared
The first length before the assembly of formula pipe fitting.
After flared fitting assembly, the second length of cap nut is measured, specifically:
One voltage signal is applied to piezoelectric ceramic piece using sound wave generation/receiver, at this time using temperature sensor measurement
The second temperature of air, and the third moment for applying voltage signal is recorded, positioned at cap nut one end and expose to cap nut
Piezoelectric ceramic piece one acoustic signals are generated according to voltage signal, acoustic signals are transmitted in the air of second temperature,
The other end for being transmitted to cap nut encounters return when positioned at the sound wave reverberation of the cap nut other end, wherein sound wave reverberation
Also cap nut is exposed to.Sound wave generation at this time/receiver can receive the acoustic signals of return, and records sound wave and occur/connect
Receive the 6th moment that device receives the acoustic signals returned.According to the difference at the 6th moment and third moment, sound wave letter can be obtained
Number aerial transmitting duration, according to spread speed of the acoustic signals in the air of second temperature and acoustic signals in air
The product of the half of middle transmitting duration can obtain second length of the cap nut after flared fitting assembly.
It should be noted that being limited by cap nut length, propagation of the acoustic signals in cap nut or air
Time is shorter, before flared fitting assembly, measures in this period of the first length of cap nut, it is believed that temperature
Degree will not change.After flared fitting assembly, measure in this period of the second length of cap nut, it can also
To think that temperature will not change.But flared fitting assembly before with flared fitting assembly after between this
In the section time, due to not knowing the length of interval time, not can guarantee temperature will not change.And the first temperature here and
Second temperature, which belongs to, to be referred to, it may be assumed that the first temperature of cap nut and the first temperature of air might not represent identical temperature.
In the above embodiment of the present invention, according to the difference of the second length and the first length, housing caused by temperature change
The change of nut length, and the coefficient of elasticity being obtained ahead of time, the step of obtaining the pretightning force of flared fitting include:
The difference of second length and the first length is added or is subtracted the cap nut length as caused by temperature change
Variable quantity, resulting value is multiplied with coefficient of elasticity, obtains the pretightning force of flared fitting.
Specifically, measuring temperature at that time first when measuring the first length and the second length, the first length of measurement is obtained
When the second length of the first temperature and measurement when second temperature, and the first temperature and second temperature are compared, when first
When temperature and equal second temperature, without considering the influence of the variation of temperature to the spread speed of sound wave；Meanwhile calculating housing spiral shell
When female length, without influence of the variation of temperature to its size is considered, the first of cap nut directly can be measured and calculated
Length and the second length.
When the first temperature and second temperature be not identical, need to consider the variation of temperature to the shadow of the spread speed of sound wave
It rings；Simultaneously, it is also desirable to consider influence of the variation to its size of temperature.When the first temperature and second temperature are unequal, it should
Acoustic signals spread speed corresponding with temperature is used to calculate the first length and the second length respectively.Due to the first temperature and second
Temperature is unequal, and the length of cap nut can generate variation due to expanding with heat and contract with cold, and cap nut is influenced by pretightning force and generated
Elongation is equal to the second length and the difference of the first length subtracts or plus the variable quantity for being affected by temperature generation.
The difference of the second length Yu the first length is obtained first, and it is long then to obtain the cap nut as caused by temperature change
The variable quantity of degree.When the first temperature is less than second temperature, since temperature raises when measuring the second length, cap nut expansion
Length increases, therefore the elongation that cap nut is influenced by pretightning force and generated subtracts equal to the difference of the second length and the first length
Remove the variable quantity for being affected by temperature generation.
When the first temperature is greater than second temperature, when measuring the second length since temperature reduces, cap nut shrinkage is long
Degree reduces, therefore the elongation that cap nut is influenced by pretightning force and generated is added equal to the difference of the second length and the first length
It is affected by temperature the variable quantity of generation.
It is assumed that the elongation that cap nut is influenced by pretightning force and generated is δ l, according to the coefficient of elasticity k obtained in advance, benefit
The pretightning force of flared fitting is calculated with Hooke's law law (formula 1).
F=k* δ l formula one
F is pretightning force, and k is coefficient of elasticity, and k is related with the material of cap nut and shape.Due to the shape of cap nut
Shape is not regular, so k value is unknown, accurate k value, the method that we comprehensively utilize emulation and experiment are obtained in order to obtain
Relationship between different materials, the pretightning force F of different size flared fitting and deflection δ l, acquires k value.It needs further
Illustrate, k is not definite value, and F and δ l is non-linear relation.
In the above embodiment of the present invention, filled obtaining the cap nut measured according to acoustic signals in flared fitting
With the first length before, and according to acoustic signals measurement cap nut flared fitting assembly after the second length
When, further includes:
By the first moment of record, the second moment and obtained the first temperature of detection, and record the third moment, the 4th
The second temperature that moment and detection obtain is transferred to a terminal device, and is shown on the terminal device；Or
By the first moment of record, the 5th moment and obtained the first temperature of detection, and record the third moment, the 6th
The second temperature that moment and detection obtain is transferred to a terminal device, and is shown on the terminal device.
The temperature information of information at the time of record and detection can be sent to the terminal device connecting with measuring device, such as
Control to measuring device may be implemented using portable terminal devices such as smart phones and to the reading of measurement result in smart phone
It takes.Such as the available time information of terminal device and temperature information, according to time information, temperature information, and the sound prestored
The spread speed of wave signal can calculate the first length and the second length of cap nut, according to the second length and the first length
Difference, the coefficient of elasticity of change and the storage of cap nut length caused by temperature change calculates and obtains flared type pipe and connect
The pretightning force of head.Wherein measuring device can be connect by Bluetooth technology with terminal device, realized the transmitting of information, can also be led to
Cross other means.
The embodiment of the present invention also provides a kind of pretightening force measuring apparatus of flared fitting, as shown in Figure 5, comprising:
Piezoelectric ceramic piece 5 positioned at 1 one end of cap nut of flared fitting；It is being connect with piezoelectric ceramic piece 5, for pressure
Sound wave generation/receiver 6 of the application voltage signal of electroceramics piece 5；And the temperature of detection temperature on cap nut 1 is set
Spend sensor 11 and with temperature sensor 11 connect, compared with acquisition temperature value temperature detector 12.
Specifically, setting detects the temperature sensor 11 of temperature on cap nut 1, it can be in measurement flared fitting
It is right when the second length of the cap nut 1 after the first length and the flared fitting assembly of the cap nut 1 before assembly
Temperature measures, and the temperature that measurement obtains is transferred to temperature detector 12, convenient for 12 couples of temperature detector two obtained
Temperature value is compared.When two temperature values are equal, without considering the influence of temperature, when two temperature values are unequal
When, then need the influence for considering temperature.
Before flared fitting assembly, a voltage is applied to piezoelectric ceramic piece 5 using sound wave generation/receiver 6 and is believed
Number, piezoelectric ceramic piece 5 can generate an acoustic signals according to voltage signal.Flared fitting can be measured using acoustic signals to fill
The first length with cap nut 1 before.Then right using sound wave generation/receiver 6 after flared fitting assembly
Piezoelectric ceramic piece 5 positioned at 1 one end of cap nut applies a voltage signal again, and piezoelectric ceramic piece 5 can be produced according to voltage signal
A raw acoustic signals.The second length of the cap nut 1 after flared fitting assembly can be measured using acoustic signals.Root
It is multiplied according to the difference of the second length and the first length with coefficient of elasticity, the pretightning force of flared fitting can be obtained.
When second temperature when the second length of the first temperature when measuring the first length and measurement is unequal, need to utilize
The difference of second length and the first length, in addition subtract the variable quantity of 1 length of cap nut as caused by temperature change,
Resulting value is multiplied with coefficient of elasticity, obtains the pretightning force of flared fitting.
Wherein, piezoelectric ceramic piece 5 is set to the bottom surface of 1 one end of cap nut, Nian Jie with cap nut 1.It can be using viscous
Property couplant (such as AB glue) realize piezoelectric ceramic piece 5 and cap nut 1 connection.Piezoelectric ceramic piece 5 is generated according to voltage signal
Acoustic signals transmitted in cap nut 1, returned after encountering air.
The connection that piezoelectric ceramic piece 5 and cap nut 1 can also be realized using special fixture, as shown in fig. 6, in housing spiral shell
The first fixture 8 and the second fixture 9 is respectively set in the both ends of mother 1, and the first fixture 8 and the second fixture 9 expose to cap nut 1,
5 clamping of piezoelectric ceramic piece is provided with sound wave reverberation 10, piezoelectric ceramic piece 5 and sound wave on the first fixture 8 on second fixture 9
Reverberation 10 is opposite.
Specifically, the first fixture 8 and the second fixture 9 to be separately positioned on to the both ends of cap nut 1, wherein the first fixture 8
It is opposite and parallel to each other with the second fixture 9.Piezoelectric ceramic piece 5 is set on the first fixture 8, setting and pressure on the second fixture 9
The opposite sound wave reverberation 10 of electroceramics piece 5, since the first fixture 8 and the second fixture 9 expose to cap nut 1, electroceramics piece 5
It can be transmitted according to the acoustic signals that voltage signal generates, be returned after encountering sound wave reverberation 10 in air.
In the above embodiment of the present invention, as shown in Figure 5 and Figure 6, measuring device further include: with sound wave generation/receiver 6
Connection, for sound wave generation/receiver 6 provide the power supply 7 of voltage；And with sound wave generation/receiver 6 and temperature detector 12
The terminal device 13 of connection.
Specifically, providing the power supply 7 of voltage by being set as sound wave generation/receiver 6, it is ensured that sound wave occurs/connects
Receive the normal work of device 6.
By the way that the terminal device 13 connecting with sound wave generation/receiver 6 and temperature detector 12 is arranged, terminal can be made
Equipment 13 obtains corresponding information, calculates the length variable quantity of cap nut 1.And according to the length variable quantity of cap nut 1, and
The coefficient of elasticity of storage calculates the pretightning force for obtaining flared fitting.Wherein sound wave generation/receiver 6 and temperature detector
12 can be connect by Bluetooth technology with terminal device 13, realize the transmitting of information, can also be by other means.
The embodiment of the present invention, by applying a voltage signal to the piezoelectric ceramic piece for being located at cap nut one end, so that pressure
Electroceramics piece generates an acoustic signals, utilizes first length of the acoustic signals measurement cap nut before flared fitting assembly
Degree, then using acoustic signals measurement cap nut flared fitting assembly after the second length, according to the first length,
The difference of second length, the change and corresponding coefficient of elasticity of cap nut length caused by temperature change, calculating are expanded
The pretightning force of mouth formula pipe fitting.The embodiment of the present invention can be realized the pretightning force of real-time measurement flared fitting, be flared type
The monitoring of pretightning force provides a kind of technological means in the assembly of pipe fitting, debugging and work, solve in the prior art by
The problem of that structure is complicated is compact in pipe fitting, is unable to measure the pretightning force of flared fitting.
It should be noted that the pretightening force measuring apparatus of flared fitting provided by the invention is using the above method
Device, all implementations can also reach identical skill suitable for the embodiment of the device in above method embodiment
Art effect.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of preload force measuring method of flared fitting characterized by comprising
The acoustic signals that piezoelectric ceramic piece is generated according to voltage signal are obtained, the voltage signal is occurred/connects using sound wave
Receive the voltage signal that device applies the piezoelectric ceramic piece of the cap nut one end for being located at the flared fitting；
Obtain first length of the cap nut measured according to the acoustic signals before flared fitting assembly
It spends, and second length of the cap nut measured according to the acoustic signals after flared fitting assembly；
According to the difference of second length and first length, the cap nut length caused by temperature change changes
Become, and the coefficient of elasticity being obtained ahead of time, obtains the pretightning force of the flared fitting；Wherein the coefficient of elasticity utilizes imitative
True and experiment method obtains；
Obtaining first of the cap nut measured according to the acoustic signals before flared fitting assembly
Length, and according to the acoustic signals measurement the cap nut the flared fitting assembly after the second length
When, the method also includes:
The first temperature when measuring first length, and second when measurement second length are detected using temperature sensor
Temperature, wherein the first temperature when measuring first length is the temperature of cap nut, when measuring second length the
Two temperature are the temperature of cap nut；Or the first temperature when measuring first length is the temperature of air, described in measurement
Second temperature when the second length is the temperature of air；
The difference according to second length and first length, the cap nut length caused by temperature change
Change, and the coefficient of elasticity being obtained ahead of time, obtain the pretightning force of the flared fitting, comprising:
The difference of second length and first length is added or is subtracted the housing as caused by temperature change
The variable quantity of nut length, resulting value are multiplied with the coefficient of elasticity, obtain the pretightning force of the flared fitting.
2. the method according to claim 1, wherein it is described obtain according to the acoustic signals measure it is described outside
Cover first length of the nut before flared fitting assembly, and the housing spiral shell measured according to the acoustic signals
Second length of the mother after flared fitting assembly, comprising:
Before flared fitting assembly, records the sound wave generation/receiver and one is applied to the piezoelectric ceramic piece
First moment of voltage signal；
It records the acoustic signals to be transmitted in the cap nut of first temperature, simultaneously quilt is returned when encountering air
The second moment that the sound wave generation/receiver receives；
According to spread speed of the acoustic signals in the cap nut of first temperature and second moment with
The product of the half of the first moment difference obtains first length；
After flared fitting assembly, records the sound wave generation/receiver and one is applied to the piezoelectric ceramic piece
The third moment of voltage signal；
It records the acoustic signals to be transmitted in the cap nut of the second temperature, simultaneously quilt is returned when encountering air
The 4th moment that the sound wave generation/receiver receives；
According to spread speed of the acoustic signals in the cap nut of the second temperature and the 4th moment with
The product of the half of the third moment difference obtains second length.
3. the method according to claim 1, wherein it is described obtain according to the acoustic signals measure it is described outside
Cover first length of the nut before flared fitting assembly, and the housing spiral shell measured according to the acoustic signals
Second length of the mother after flared fitting assembly, comprising:
Before flared fitting assembly, records the sound wave generation/receiver and one is applied to the piezoelectric ceramic piece
First moment of voltage signal；
It records the acoustic signals to transmit in the air of first temperature, encounters the sound positioned at the cap nut other end
The 5th moment for returning when wave reflection object and being received by the sound wave generation/receiver, wherein the piezoelectric ceramic piece and institute
It states sound wave reverberation and exposes to the cap nut；
According to spread speed of the acoustic signals in the air of first temperature and the 5th moment and described first
The product of the half of moment difference obtains first length；
After flared fitting assembly, records the sound wave generation/receiver and one is applied to the piezoelectric ceramic piece
The third moment of voltage signal；
It records the acoustic signals to transmit in the air of the second temperature, encounters the sound positioned at the cap nut other end
The 6th moment for returning when wave reflection object and being received by the sound wave generation/receiver；
According to spread speed of the acoustic signals in the air of the second temperature and the 6th moment and the third
The product of the half of moment difference obtains second length.
4. according to the method described in claim 2, it is characterized in that, it is described obtain according to the acoustic signals measure it is described outside
Cover first length of the nut before flared fitting assembly, and the housing spiral shell measured according to the acoustic signals
Mother the flared fitting assembly after the second length when, the method also includes:
First temperature that first moment of record, second moment and detection are obtained, and record are described
The second temperature that third moment, the 4th moment and detection obtain is transferred to a terminal device, and sets in the terminal
It is shown on standby.
5. according to the method described in claim 3, it is characterized in that, it is described obtain according to the acoustic signals measure it is described outside
Cover first length of the nut before flared fitting assembly, and the housing spiral shell measured according to the acoustic signals
Mother the flared fitting assembly after the second length when, the method also includes:
First temperature that first moment of record, the 5th moment and detection are obtained, and record are described
The second temperature that third moment, the 6th moment and detection obtain is transferred to a terminal device, and sets in the terminal
It is shown on standby.
6. a kind of pretightening force measuring apparatus of flared fitting characterized by comprising
Piezoelectric ceramic piece (5) positioned at cap nut (1) one end of flared fitting；
Sound wave generation/reception being connect with the piezoelectric ceramic piece (5), applying voltage signal for the piezoelectric ceramic piece (5)
Device (6)；And
Be arranged it is on the cap nut (1), detection temperature temperature sensor (11) and with the temperature sensor (11)
The temperature detector (12) of temperature value connecting, comparing acquisition；
After the first length and flared fitting assembly of the cap nut (1) before measurement flared fitting assembly
When the second length of cap nut (1), the temperature sensor (11) measures temperature, wherein measuring first length
When the first temperature be cap nut temperature, measure second length when second temperature be cap nut temperature；Or
The first temperature when person measures first length is the temperature of air, and second temperature when measuring second length is air
Temperature；
When the first temperature when measuring first length and unequal second temperature when measuring second length, utilize
The difference of second length and first length, in addition to subtract the cap nut as caused by temperature change long
The variable quantity of degree, resulting value are multiplied with coefficient of elasticity, obtain the pretightning force of flared fitting.
7. the pretightening force measuring apparatus of flared fitting according to claim 6, which is characterized in that the piezoelectric ceramics
Piece (5) is set to the bottom surface of the cap nut (1) one end, Nian Jie with the cap nut (1).
8. the pretightening force measuring apparatus of flared fitting according to claim 6, which is characterized in that the cap nut
(1) both ends are respectively arranged with the first fixture (8) and the second fixture (9), and first fixture (8) and second fixture
(9) it exposes to the cap nut (1), piezoelectric ceramic piece (5) clamping is on first fixture (8), second folder
It is provided with sound wave reverberation (10) on tool (9), the piezoelectric ceramic piece (5) and the sound wave reverberation (10) are opposite.
9. the pretightening force measuring apparatus of flared fitting according to claim 6, which is characterized in that the measuring device
Further include: it is being connect with the sound wave generation/receiver (6), provide the power supply of voltage for the sound wave generation/receiver (6)
(7)。
10. the pretightening force measuring apparatus of flared fitting according to claim 6, which is characterized in that the measurement dress
It sets further include:
The terminal device (13) being connect with the sound wave generation/receiver (6) and the temperature detector (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181811.5A CN105865665B (en) | 2016-03-28 | 2016-03-28 | A kind of the preload force measuring method and device of flared fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610181811.5A CN105865665B (en) | 2016-03-28 | 2016-03-28 | A kind of the preload force measuring method and device of flared fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105865665A CN105865665A (en) | 2016-08-17 |
| CN105865665B true CN105865665B (en) | 2019-01-29 |
Family
ID=56625777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610181811.5A Expired - Fee Related CN105865665B (en) | 2016-03-28 | 2016-03-28 | A kind of the preload force measuring method and device of flared fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105865665B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404245B (en) * | 2016-08-24 | 2019-04-16 | 北京星航机电装备有限公司 | A kind of flared type combined catheter cap nut mounting torque determines method |
| CN112240825B (en) * | 2019-07-19 | 2023-07-07 | 中国航天标准化研究所 | Device and method for testing torsion-pull relation of pipe joint sealing structure |
| CN110469729A (en) * | 2019-08-26 | 2019-11-19 | 广东国鸿氢能科技有限公司 | A kind of novel clamp sleeve type pipe joint |
| CN114232847A (en) * | 2021-10-12 | 2022-03-25 | 广西瑞宇建筑科技有限公司 | Intelligent self-sensing glass curtain wall system |
| CN114166396B (en) * | 2022-02-14 | 2022-05-20 | 龙口市动力油管有限公司 | Area is from pretightning force detection device of pretension formula isolation bushing pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735377A (en) * | 2012-07-11 | 2012-10-17 | 哈尔滨工程大学 | Dynamic pre-tightened piezoelectric type force sensor for projects |
| CN202757716U (en) * | 2012-07-11 | 2013-02-27 | 哈尔滨工程大学 | Dynamic pre-tightened piezoelectric type force sensor for projects |
| CN103644997A (en) * | 2013-12-25 | 2014-03-19 | 武汉科技大学 | Piezoelectric intelligent material based bolt pre-tightening force sensor |
| CN104764548A (en) * | 2015-04-23 | 2015-07-08 | 武汉科技大学 | Bolt pretightening force sensor based on piezoelectric time reversal |
| CN105258836A (en) * | 2015-10-27 | 2016-01-20 | 中国铁道科学研究院铁道建筑研究所 | System and method for monitoring state of bolt |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101688769B (en) * | 2007-07-03 | 2012-08-29 | G科德系统有限公司 | Pre tension monitoring solution |
| KR101190024B1 (en) * | 2010-06-14 | 2012-10-12 | 한국전력공사 | Apparatus and method for measuring the pre-load of bolts using nonlinear guided ultrasound |
-
2016
- 2016-03-28 CN CN201610181811.5A patent/CN105865665B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735377A (en) * | 2012-07-11 | 2012-10-17 | 哈尔滨工程大学 | Dynamic pre-tightened piezoelectric type force sensor for projects |
| CN202757716U (en) * | 2012-07-11 | 2013-02-27 | 哈尔滨工程大学 | Dynamic pre-tightened piezoelectric type force sensor for projects |
| CN103644997A (en) * | 2013-12-25 | 2014-03-19 | 武汉科技大学 | Piezoelectric intelligent material based bolt pre-tightening force sensor |
| CN104764548A (en) * | 2015-04-23 | 2015-07-08 | 武汉科技大学 | Bolt pretightening force sensor based on piezoelectric time reversal |
| CN105258836A (en) * | 2015-10-27 | 2016-01-20 | 中国铁道科学研究院铁道建筑研究所 | System and method for monitoring state of bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105865665A (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105865665B (en) | A kind of the preload force measuring method and device of flared fitting | |
| US3939823A (en) | Esophageal transducer | |
| RU2636272C2 (en) | Pressure sensor with mineral-insulated cable | |
| CN105865701B (en) | A kind of high temperature villiaumite pressure gauge | |
| CN203163913U (en) | Diaphragm type fiber bragg grating pressure sensor with temperature compensation | |
| US9568387B2 (en) | Thermal diagnostic for single-crystal process fluid pressure sensor | |
| CN106525181B (en) | Double-shell ultrasonic transducer with temperature compensation gas | |
| CN112254872A (en) | High-temperature pressure sensor with vacuum heat insulation cavity | |
| CN105627106B (en) | A kind of infrasound sensor of gas pipeline leak detection | |
| CN103884399B (en) | Fluid level transmitter | |
| RU2649042C1 (en) | Corrosive resistant pressure module for process fluid pressure transducer | |
| CN109855789A (en) | It is a kind of for monitoring the sensor of underwater small aircraft surface pressing | |
| CN113534114A (en) | High-stability underwater sound standard device and manufacturing method thereof | |
| CN101464198B (en) | Diaphragm type high-temperature pressure sensor | |
| CN202956233U (en) | Metallic film interface stress sensor | |
| CN110044520A (en) | The force snesor of pressure between measurement solid | |
| CN113566914B (en) | Non-welding type piezoelectric vibrator connecting device and ultrasonic flow detection device adopting same | |
| EP3825672B1 (en) | Methods and apparatuses for providing freeze resistant sensing assembly | |
| CN209470662U (en) | A kind of tool-type strain transducer | |
| CN109521142B (en) | Device and method for measuring sound velocity of solid propellant under pressure change condition | |
| CN202393546U (en) | Piezoelectric sensor system inside pipeline | |
| CN208704955U (en) | A kind of the teletransmission component and teletransmission pressure transmitter of the double isolation diaphragms of band | |
| RU88236U1 (en) | HYDROPHONE | |
| CN111829466A (en) | High-temperature electromagnetic ultrasonic thickness measuring probe | |
| US20230204439A1 (en) | Sensor device for fluid fitting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190129 |