CN107884138A - A kind of detection method of metal hose and joint tension intensity - Google Patents
A kind of detection method of metal hose and joint tension intensity Download PDFInfo
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- CN107884138A CN107884138A CN201711039096.2A CN201711039096A CN107884138A CN 107884138 A CN107884138 A CN 107884138A CN 201711039096 A CN201711039096 A CN 201711039096A CN 107884138 A CN107884138 A CN 107884138A
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- metal hose
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- pressure
- belt lacing
- joint
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of metal hose and the detection method of joint tension intensity, including step to be：Step 1, belt lacing metal hose installation to be measured；Step 2, the installation connection of pressure pump；Step 3, belt lacing metal hose sealing detection to be measured；Step 4, belt lacing metal hose tension intensity detection to be measured；Step 5, resistance to elevated temperatures detects.The present invention tensile property, sealing property and resistance to elevated temperatures of metal hose can be carried out individually and joint-detection, can simulate pulling force and it is high temperature combined when extreme condition under performance test, it is simple to operate, test is safe and reliable.
Description
Technical field
The present invention relates to metal hose manufacturing field, the detection side of particularly a kind of metal hose and joint tension intensity
Method.
Background technology
Metal hose is the important composition part in modern industrial equipment connecting pipeline.Metal hose be used as electric wire, cable,
The electric wire protection pipe of instrument and meter for automation signal and civilian shower hose, specification is from 3mm to 150mm.Small diameter metal flexible pipe
(internal diameter 3mm-25mm) is mainly used in the sense line protection of precision optics chi, industrial sensor route protection.Metal hose produces
Product include defeated oil suction hose, steam sebific duct, sand blast hose, defeated chemical suction hose, food hose, oxygen rubber pipe and various special-shaped glue
Pipe etc..It is widely used in the industries such as machinery, chemical industry, oil, metallurgy, food.
The pressure limit of pressure tight metal flexible pipe is how many:The pressure limit of flexible pipe is generally PN0.6-32.0Mpa.Highest
Up to 42.0MPa.Metal hose is the pressure parts that flexible pipe is arranged in pressure piping, while plays sheath to bellows,
Pressure size and application places in pipeline, stainless steel wire or the steel band that one or more layers may be selected are woven.
Because the latus rectum of shallow ring metal bellows is big, pressure-bearing is high, heat-resisting, flexible, corrosion-resistant, service life length, and
It is widely used in a variety of pipelines such as room inlet pipeline, fuel gas pipeline, solar water heater hydraulic pipeline, fire main.
Presently used metal bellows is generally the finished product of various different lengths, during for installation selection use, because scene is pacified
Need the length of bellows to be difficult to be determined in advance during dress, generally require to take the bellows of different lengths specification.With bellows
The raising of manufacturing technology, the country can produce 300 meters of long bellowss, if realize on-site cutting and ensure bellows with it is other
Pipe fitting is convenient and fast connection and safe and reliable, fixed that expansion metal bellows significantly is used into field.China national intellectual property
Disclosed on website it is a kind of be used for field erected metal bellows, including body be enclosed on nut thereon, the body
End forms a boss, and the external diameter of boss is more than the aperture of nut inner hole, a ring is clamped at the body wave trough on the inside of boss
Shape open metal pads.When metal bellows is connected with other bodys, the advantages of convenient and swift, cost is low is provided with, still
Its bonding strength is relatively low, when body when pulled, bellows body and the easy overstress in nut coupling part, its sealing drop
It is low, and gas leakage etc. is produced, so as to reduce security and service life when corrugated flexible hose uses.The external diameter of other corrugated flexible hose
Internal diameter than pipe screw thread generally requires small more than 2mm, limits its use range.
The Chinese utility model patent application of Application No. 201320065701.4, entitled " one kind of its innovation and creation
Fuel gas transmission stainless steel ripple hose connection device ", the axial tensile-strength of the attachment means is big；The advantages of sealing is high,
Inner space is saved so that larger external diameter corrugated flexible hose can use the pipe screw thread of standard.Even but so, metal wave
Line pipe is both needed to detect tensile property, sealing property and resistance to elevated temperatures before dispatching from the factory and using after a period of time.Mesh
Before, tensile property, sealing property and the resistance to elevated temperatures detection of metallized metal flexible pipe need to be sent to the department specified and be detected, and examine
Costly, time length is surveyed, and detection means is inconvenient for operation.It really is able to accomplish that the enterprise of the requirement is seldom in factory, needs
Configure special place and equipment.In addition, specific office can only also carry out tensile property, sealing property and resistance to elevated temperatures
Independent testing performance index, it is impossible to simulate virtual condition, test data reliability is low.
The content of the invention
In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a kind of metal hose and connect
The detection method of the detection method of head tension intensity, the metal hose and joint tension intensity can be to the pull resistance of metal hose
Can, sealing property and resistance to elevated temperatures carry out individually and joint-detection, can simulate pulling force and it is high temperature combined when extreme condition under
Performance test, it is simple to operate, test is safe and reliable.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of detection method of metal hose and joint tension intensity, comprises the following steps.
Step 1, belt lacing metal hose installation to be measured：The length used as needed, the quantity of metal hose section is selected,
It will be connected between adjacent two metal hose sections by transition joint；The tail end connection three of belt lacing metal hose to be measured
The straight-through end of one of pass joint, another straight-through end of three-way connection and another tail end of belt lacing metal hose to be measured are each
One tail end of connection boils in a covered pot over a slow fire head；One of tail end is boiled in a covered pot over a slow fire after head passes through from explosive-proof protector cover, passes through flange and fatigue tester
Lower stretching head is connected；Explosive-proof protector cover bottom is connected by flange with fatigue test motor spindle；Another tail end is boiled in a covered pot over a slow fire head and led to
Flange is crossed with the upper stretching head of fatigue tester to be connected.
Step 2, the installation connection of pressure pump：The delivery port of pressure pump is connected with the remaining joint of three-way connection,
The water inlet end of pressure pump is connected by high pressure rubber hose with water tank, and one and pressure pump phase are installed on high pressure rubber hose
The pressure sensor of connection.
Step 3, belt lacing metal hose sealing detection to be measured：Pressure pump starts and pressurizeed, and pressure (hydraulic) water injection is treated
In measuring tape joint metal flexible pipe；Then, under pressure constant state, kept for 10-30 minutes, observe belt lacing metal hose internal pressure to be measured
The situation of change of power；When the pressure in belt lacing metal hose to be measured fluctuates in setting range, then belt lacing to be measured is judged
Metal hose sealing property meets to require；It is otherwise, it is determined that unqualified for sealing property.
Step 4, belt lacing metal hose tension intensity detection to be measured：Comprise the following steps.
Step 41, the stress amplitude of fatigue tester is horizontally selected：Assuming that the setting fracture of belt lacing metal hose to be measured is drawn
Power is N, and the horizontal quantity of stress amplitude, which is set, is no less than 3, is respectively：N/2、（N/2±N/10）…….
Step 42, tired tension test：After belt lacing metal hose sealing property to be measured detection is qualified, make to treat that measuring tape connects
Under pressure constant state, fatigue tester starts head metal hose, and the stress amplitude set according to step 41 is horizontal, from small to large,
Fatigue loading stretching is carried out successively.
Step 43, tired drafting results judge：The pressure in measuring tape joint metal flexible pipe is treated using pressure sensor to enter
Row monitoring in real time, the detection and judgement of belt lacing metal hose sealing property to be measured are carried out to each stress amplitude level.
Step 5, resistance to elevated temperatures detects：After tension intensity detection is qualified in step 4, fatigue tester is set to be maintained at most
Big stress amplitude is horizontal, and electrical heating wire is heated to design temperature, and keeps constant temperature to be no less than 30min, observes belt lacing metal to be measured
Pressure change in flexible pipe, when belt lacing metal hose to be measured still meets that sealing property detects, then judgement resistance to elevated temperatures is qualified.
In step 3, before pressure pump pressurization, three pressure points A, B and C are first set, point A corresponding pressures are belt lacing to be measured
The maximum pressure-resistant half of metal hose, point B corresponding pressures are 2/3rds of belt lacing metal hose maximum pressure to be measured, point C
Corresponding pressure is then to be maximum pressure-resistant；When pressure pump pressurizes, point A is first forced into, after sealing property judges qualified at point A, then
Point B is forced into, after sealing property judges qualified at point B, last repressurization is examined to point C, and to sealing property at point C
Survey.
In step 41, the horizontal quantity of stress amplitude, which is set, is no less than 5, is respectively：N/2、（N/2±N/10）、（N/2±
2NL/10）…….
In step 4, the Loaded contact analysis of fatigue tester is sine wave, and loading stress ratio is 0.1.
In step 5, after electrical heating wire is heated to design temperature, and constant temperature is kept to be no less than 10h.
The invention has the advantages that：The tensile property, sealing property and resistance to elevated temperatures of metal hose can be entered
Row individually and joint-detection, can simulate pulling force and it is high temperature combined when extreme condition under performance test, it is simple to operate, test peace
It is complete reliable.
Brief description of the drawings
Fig. 1 shows the structural representation of a kind of fuel gas transmission metal hose of the present invention and joint tension intensity detection means
Figure.
Wherein have：
10. fatigue tester；Stretching head on 11.；12. lower stretching head；
20. belt lacing metal hose to be measured；21. metal hose section；22. transition joint；23. three-way connection；24. tail end boils in a covered pot over a slow fire head；
30. electrical heating wire；
40. explosive-proof protector cover；41. heat-insulation layer；
50. pressure pump；51. water tank；52. high pressure rubber hose；53. pressure sensor；54. relief valve.
Embodiment
The present invention is further detailed explanation with specific better embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of fuel gas transmission metal hose and joint tension intensity detection means, measuring tape is treated for detecting
The tension intensity of joint metal flexible pipe 20；It includes fatigue tester 10, electrical heating wire 30, explosive-proof protector cover 40 and pressure pump
50。
Belt lacing metal hose 20 to be measured includes metal hose section 21, transition joint 22, three-way connection 23 and tail end and boils in a covered pot over a slow fire head
24.The quantity of metal hose section is at least two, can be three, four or more, required with specific reference to actual use
Length is attached.
It is connected between adjacent two metal hose sections by transition joint sealing, intermediate connector here can use
Attachment means described in 201320065701.4, by increasing capacitance it is possible to increase axial tensile-strength and sealing.
Three-way connection is arranged on one end of belt lacing metal hose to be measured, and one of them of three-way connection vertically arranged connects
Head and
The other end of belt lacing metal hose to be measured is sealedly connected with tail end and boils in a covered pot over a slow fire head.
Fatigue tester includes the upper stretching head 11 being coaxially disposed and lower stretching head 12.Upper stretching head and lower stretching head are excellent
Choosing and fatigue tester releasable connection.
Positioned at belt lacing metal hose both ends to be measured tail end boil in a covered pot over a slow fire head respectively preferably by flange and upper stretching head and under
Stretching head is connected.
The explosive-proof protector enclosure is located at the periphery of belt lacing metal hose to be measured, the bottom of explosive-proof protector cover and fatigue tester
Base between preferably connected by flange.
Electrical heating wire is uniformly arranged on the internal face of explosive-proof protector cover, and the outside wall surface of the explosive-proof protector enclosure is coated with insulation
Layer 41.
Pressure pump 50 is connected by high pressure rubber hose 52 with one joint of residue in three-way connection；Pressure pump
The other end be connected with water tank 51；The pressure sensor 53 that pressure pump is connected, high pressure are provided with high pressure rubber hose
Relief valve 54 is further preferably provided with rubber hose.
A kind of detection method of metal hose and joint tension intensity, comprises the following steps.
Step 1, belt lacing metal hose installation to be measured：The length used as needed, the quantity of metal hose section is selected,
It will be connected between adjacent two metal hose sections by transition joint；The tail end connection three of belt lacing metal hose to be measured
The straight-through end of one of pass joint, another straight-through end of three-way connection and another tail end of belt lacing metal hose to be measured are each
One tail end of connection boils in a covered pot over a slow fire head；One of tail end is boiled in a covered pot over a slow fire after head passes through from explosive-proof protector cover, passes through flange and fatigue tester
Lower stretching head is connected；Explosive-proof protector cover bottom is connected by flange with fatigue test motor spindle；Another tail end is boiled in a covered pot over a slow fire head and led to
Flange is crossed with the upper stretching head of fatigue tester to be connected.
Step 2, the installation connection of pressure pump：The delivery port of pressure pump is connected with the remaining joint of three-way connection,
The water inlet end of pressure pump is connected by high pressure rubber hose with water tank, and one and pressure pump phase are installed on high pressure rubber hose
The pressure sensor of connection.
Step 3, belt lacing metal hose sealing detection to be measured.
Before pressure pump pressurization, three pressure points A, B and C are first set, point A corresponding pressures are belt lacing metal hose to be measured
Maximum pressure-resistant half, point B corresponding pressures are 2/3rds of belt lacing metal hose maximum pressure to be measured, point C corresponding pressures
Then to be maximum pressure-resistant；When pressure pump pressurizes, point A is first forced into, after sealing property judges qualified at point A, repressurization to point
B, after sealing property judges qualified at point B, last repressurization detects to point C, and to sealing property at point C.
Pressure pump starts and pressurizeed, and pressure (hydraulic) water is injected in belt lacing metal hose to be measured；Then, in pressure constant state
Under, kept for 10-30 minutes, observe the situation of change of pressure in belt lacing metal hose to be measured；When belt lacing metal hose to be measured
When interior pressure fluctuates in setting range, then judge that belt lacing metal hose sealing property to be measured meets to require；Otherwise, it is determined that
It is unqualified for sealing property.
Step 4, belt lacing metal hose tension intensity detection to be measured：Comprise the following steps.
Step 41, the stress amplitude of fatigue tester is horizontally selected：Assuming that the setting fracture of belt lacing metal hose to be measured is drawn
Power is N, and the horizontal quantity of stress amplitude, which is set, is no less than 3, is respectively：N/2、（N/2±N/10）…….
Further, the horizontal quantity of stress amplitude, which is set, is preferably no less than 5, is respectively：N/2、（N/2±N/10）、（N/2±
2NL/10）…….
Step 42, tired tension test：After belt lacing metal hose sealing property to be measured detection is qualified, make to treat that measuring tape connects
Under pressure constant state, fatigue tester starts head metal hose, and the stress amplitude set according to step 41 is horizontal, from small to large,
Fatigue loading stretching is carried out successively.The Loaded contact analysis of fatigue tester is preferably sine wave, loading stress ratio preferably 0.1.
Step 43, tired drafting results judge：The pressure in measuring tape joint metal flexible pipe is treated using pressure sensor to enter
Row monitoring in real time, the detection and judgement of belt lacing metal hose sealing property to be measured are carried out to each stress amplitude level.
Step 5, resistance to elevated temperatures detects：After tension intensity detection is qualified in step 4, fatigue tester is set to be maintained at most
Big stress amplitude is horizontal, and electrical heating wire is heated to design temperature, and keeps constant temperature to be no less than 30min, preferably no less than 10h.Constant temperature
During, the pressure change in belt lacing metal hose to be measured is observed, when belt lacing metal hose to be measured still meets sealing property
Detection, then judge that resistance to elevated temperatures is qualified.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (5)
- A kind of 1. detection method of metal hose and joint tension intensity, it is characterised in that：Comprise the following steps：Step 1, belt lacing metal hose installation to be measured：The length used as needed, the quantity of metal hose section is selected, by phase It is connected between adjacent two metal hose sections by transition joint；The tail end connection three of belt lacing metal hose to be measured connects The straight-through end of one of head, another straight-through end of three-way connection and another tail end of belt lacing metal hose to be measured respectively connect One tail end boils in a covered pot over a slow fire head；After the stewing head of one of tail end passes through from explosive-proof protector cover, pass through the drop-down of flange and fatigue tester Extension head is connected；Explosive-proof protector cover bottom is connected by flange with fatigue test motor spindle；Another tail end boils in a covered pot over a slow fire head and passes through method Orchid is connected with the upper stretching head of fatigue tester；Step 2, the installation connection of pressure pump：The delivery port of pressure pump is connected with the remaining joint of three-way connection, pressurization The water inlet end of water pump is connected by high pressure rubber hose with water tank, and install one on high pressure rubber hose is connected with pressure pump Pressure sensor；Step 3, belt lacing metal hose sealing detection to be measured：Pressure pump starts and pressurizeed, and pressure (hydraulic) water injection is treated into measuring tape In joint metal flexible pipe；Then, under pressure constant state, kept for 10-30 minutes, observe pressure in belt lacing metal hose to be measured Situation of change；When the pressure in belt lacing metal hose to be measured fluctuates in setting range, then belt lacing metal to be measured is judged Flexible pipe sealing property meets to require；It is otherwise, it is determined that unqualified for sealing property；Step 4, belt lacing metal hose tension intensity detection to be measured：Comprise the following steps：Step 41, the stress amplitude of fatigue tester is horizontally selected：Assuming that belt lacing metal hose to be measured set tensile fracture as N, the horizontal quantity of stress amplitude, which is set, is no less than 3, is respectively：N/2、（N/2±N/10）……；Step 42, tired tension test：After belt lacing metal hose sealing property to be measured detection is qualified, make belt lacing gold to be measured Belong to flexible pipe under pressure constant state, fatigue tester starts, and the stress amplitude set according to step 41 is horizontal, from small to large, successively Carry out fatigue loading stretching；Step 43, tired drafting results judge：The pressure treated using pressure sensor in measuring tape joint metal flexible pipe is carried out in fact When monitor, the detection and judgement of belt lacing metal hose sealing property to be measured are carried out to each stress amplitude level；Step 5, resistance to elevated temperatures detects：After tension intensity detection is qualified in step 4, fatigue tester is maintained at maximum and answer Power width is horizontal, and electrical heating wire is heated to design temperature, and keeps constant temperature to be no less than 30min, observes belt lacing metal hose to be measured Interior pressure change, when belt lacing metal hose to be measured still meets that sealing property detects, then judgement resistance to elevated temperatures is qualified.
- 2. the detection method of metal hose according to claim 1 and joint tension intensity, it is characterised in that：In step 3, Before pressure pump pressurization, three pressure points A, B and C are first set, point A corresponding pressures are that belt lacing metal hose maximum to be measured is pressure-resistant Half, point B corresponding pressures are 2/3rds of belt lacing metal hose maximum pressure to be measured, and point C corresponding pressures are then to be maximum It is pressure-resistant；When pressure pump pressurizes, point A is first forced into, after sealing property judges qualified at point A, repressurization to point B, at point B After sealing property judgement is qualified, last repressurization detects to point C, and to sealing property at point C.
- 3. the detection method of metal hose according to claim 1 and joint tension intensity, it is characterised in that：Step 41 In, the horizontal quantity of stress amplitude, which is set, is no less than 5, is respectively：N/2、（N/2±N/10）、（N/2±2NL/10）…….
- 4. the detection method of metal hose according to claim 1 and joint tension intensity, it is characterised in that：In step 4, The Loaded contact analysis of fatigue tester is sine wave, and loading stress ratio is 0.1.
- 5. the detection method of metal hose according to claim 1 and joint tension intensity, it is characterised in that：In step 5, After electrical heating wire is heated to design temperature, and constant temperature is kept to be no less than 10h.
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| CN201711039096.2A CN107884138B (en) | 2017-10-31 | 2017-10-31 | A kind of detection method of metal hose and connector tension intensity |
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| CN201711039096.2A CN107884138B (en) | 2017-10-31 | 2017-10-31 | A kind of detection method of metal hose and connector tension intensity |
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| CN107884138B CN107884138B (en) | 2019-09-13 |
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Cited By (5)
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| CN109682693A (en) * | 2019-02-27 | 2019-04-26 | 沈阳众和检测有限公司 | Architectural vibration-insulation rubber tube tangential displacement test device |
| CN110736699A (en) * | 2019-09-11 | 2020-01-31 | 临海伟星新型建材有限公司 | Device for testing binding force between plastic part and metal insert and testing method thereof |
| CN110926783A (en) * | 2019-12-09 | 2020-03-27 | 哈尔滨电机厂有限责任公司 | Method for detecting external pressure deformation of insulated water conduit at high temperature |
| CN111458224A (en) * | 2020-04-18 | 2020-07-28 | 孙睿 | Rubber hose forming and detecting robot |
| CN116625620A (en) * | 2023-07-19 | 2023-08-22 | 沈阳仪表科学研究院有限公司 | Refractory metal elastic element fatigue life measuring device |
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| CN110926783A (en) * | 2019-12-09 | 2020-03-27 | 哈尔滨电机厂有限责任公司 | Method for detecting external pressure deformation of insulated water conduit at high temperature |
| CN111458224A (en) * | 2020-04-18 | 2020-07-28 | 孙睿 | Rubber hose forming and detecting robot |
| CN116625620A (en) * | 2023-07-19 | 2023-08-22 | 沈阳仪表科学研究院有限公司 | Refractory metal elastic element fatigue life measuring device |
| CN116625620B (en) * | 2023-07-19 | 2023-09-29 | 沈阳仪表科学研究院有限公司 | Refractory metal elastic element fatigue life measuring device |
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