CN111854674A - Extensometer test support with variable distance measurement function - Google Patents

Extensometer test support with variable distance measurement function Download PDF

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Publication number
CN111854674A
CN111854674A CN202010640277.6A CN202010640277A CN111854674A CN 111854674 A CN111854674 A CN 111854674A CN 202010640277 A CN202010640277 A CN 202010640277A CN 111854674 A CN111854674 A CN 111854674A
Authority
CN
China
Prior art keywords
pipe
extensometer
tube
knife
edge
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.)
Pending
Application number
CN202010640277.6A
Other languages
Chinese (zh)
Inventor
沈德建
康家诚
刘慈
李明
李成才
冯志卓
问储园
焦阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hohai University HHU
Original Assignee
Hohai University HHU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hohai University HHU filed Critical Hohai University HHU
Priority to CN202010640277.6A priority Critical patent/CN111854674A/en
Publication of CN111854674A publication Critical patent/CN111854674A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups
    • G01B21/32Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups for measuring the deformation in a solid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/02Heads
    • F16M11/04Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand

Abstract

The invention discloses a variable-distance-measuring extensometer test support which comprises a telescopic pipe, wherein the telescopic pipe comprises an inner pipe and an outer pipe which are mutually spliced, a fixed support is sleeved on the inner pipe and the outer pipe in a sliding mode, a positioning assembly is arranged on the fixed support, a telescopic frame knife edge is further arranged on the fixed support, the two telescopic frame knife edges are arranged in parallel, an electronic extensometer is arranged at the joint of the inner pipe and the outer pipe, a pair of extensometer knife edges is arranged on the electronic extensometer, a plurality of knife edge clamping grooves are uniformly distributed in the side walls of the inner pipe and the outer pipe, and the two extensometer knife edges are respectively connected and fixed with the knife edge clamping grooves in the. The invention meets the requirements of different distance measurement by adjusting the length of the telescopic frame and the position of the fixed support, and can complete the test requirements of members with different lengths by using a single extensometer.

Description

Extensometer test support with variable distance measurement function
Technical Field
The invention belongs to the field of extensometers, and particularly relates to an extensometer test bracket with variable distance measurement.
Background
The extensometer is an instrument for measuring linear deformation between two points of a component and other objects, has the characteristics of light and handy structure, convenient use, stability and reliability, and is widely applied to the development of sample deformation test experiments.
In the experimental process, the range of the existing extensometer is limited, a single extensometer is difficult to meet the measurement requirements of components with different sizes, the cost of the extensometer is high, and the cost of replacing the extensometer is too high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a variable-distance extensometer test bracket aiming at the defects of the background art. The length of the telescopic frame and the position of the fixed support are adjusted to meet the requirements of different distance measurement, and the test requirements of members with different lengths can be completed by using a single extensometer.
The invention adopts the following technical scheme for solving the technical problems:
the utility model provides a variable range finding's extensometer test support, includes flexible pipe, flexible pipe is equipped with fixing support including the inner tube and the outer tube of pegging graft each other on inner tube and the outer tube equal slip cap, the last locating component that is provided with of fixing support, still be provided with the expansion bracket edge of a knife on the fixing support, two expansion bracket edge of a knife parallel arrangement, the junction of inner tube and outer tube is provided with the electron extensometer, be provided with a pair of extensometer edge of a knife on the electron extensometer, a plurality of edge of a knife draw-in grooves of equipartition on inner tube and the outer tube lateral wall, two extensometer edges of a knife are connected fixedly with the edge.
Further, the positioning assembly is a positioning bolt.
Furthermore, the outer wall of the inner pipe is provided with a guide rail groove, and the inner wall of the outer pipe is provided with a guide rail.
Furthermore, the inner pipe and the outer pipe are both copper pipes.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the telescopic frame is adopted, the measurement requirements of members with different sizes can be met without replacing an electronic extensometer, the test range is wider, and good economic benefits are achieved; the upper and lower knife edges of the electronic extensometer are respectively clamped with the knife edge clamping grooves on the inner copper tube and the outer copper tube, and the electronic extensometer is fixed with the inner copper tube and the outer copper tube by a rubber band, so that experimental errors caused by the fact that the knife edges of the extensometer are not firmly fixed can be reduced. The inner copper pipe and the outer copper pipe have a certain diameter difference, and lubricating oil is smeared on the inner copper pipe during use to reduce experimental errors caused by pipe wall friction, so that the accuracy of the test is ensured to meet the requirements.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention for testing longer dimension members.
FIG. 2 is a schematic diagram of the structure for testing a shorter dimension component according to the present invention.
Fig. 3 is a schematic distribution diagram of knife edge clamping grooves of the inner pipe and the outer pipe.
In the figure, 1, an electronic extensometer; 2. an extensometer blade; 3. an inner tube; 4. an outer tube; 5. a telescopic frame knife edge; 6. a fixed support; 7. a bolt; 8. a knife edge clamping groove.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the utility model provides a variable range finding's extensometer test support, as shown in fig. 1, 2 and 3, including flexible pipe, flexible pipe is including the inner tube 3 and the outer tube 4 of pegging graft each other, and equal slip cap is equipped with fixing support 6 on inner tube 3 and the outer tube 4, is provided with locating component on fixing support 6, still be provided with expansion bracket edge of a knife 5 on fixing support 6, two expansion bracket edge of a knife 5 parallel arrangement, the junction of inner tube 3 and outer tube 4 is provided with electron extensometer 1, be provided with a pair of extensometer edge of a knife 2 on the electron extensometer 1, a plurality of edge of a knife draw-in grooves 8 of equipartition on inner tube 3 and the 4 lateral walls of outer tube, two extensometer edges of a knife 2 are connected fixedly with edge of a knife draw. The inner tube 3 and the outer tube 4 are made of copper tubes.
The positioning component is a positioning bolt 7. The outer wall of the inner pipe 3 is provided with a guide rail groove, and the inner wall of the outer pipe 4 is provided with a guide rail. The guide rail and the guide rail groove are matched with each other, so that the situation that the extensometer knife edge 2 cannot be inserted into the knife edge clamping groove 8 due to position deviation between the inner pipe 3 and the outer pipe 4 is avoided.
Description of specific embodiments:
as shown in fig. 1, the condition of the longer size member was tested. The length of the telescopic copper pipe is lengthened by stretching the inner pipe 3 and the outer pipe 4, the fixed support 6 is respectively adjusted to the upper end of the inner pipe 3 and the lower end of the outer pipe 4, and the fixed support 6 is fixed by screwing the positioning bolt 7, so that the measurement requirement of a longer member can be met.
As shown in fig. 2, the condition of the shorter size member was tested. The length of the telescopic copper pipe is shortened by stretching the inner copper pipe and the outer copper pipe, and the distance between the two supports is reduced by adjusting the position of the fixed support 6 so as to meet the test requirement of a short-sized component.
As shown in fig. 3, the inner tube 3 and the outer tube 4 are provided with a certain number of fine knife edge slots 8 for fixing the position of the electronic extensometer 1. Before the test is started, the length of the telescopic pipe and the position of the fixed support 6 are adjusted according to the length of the member, the member to be tested is clamped by the telescopic frame knife edge 5, the telescopic frame knife edge 5 is fixed with the member to be tested by a rubber band, and the telescopic pipe is ensured to be parallel to the member. And the upper and lower knife edges of the electronic extensometer 1 are respectively clamped into the knife edge clamping grooves 8 of the inner tube 3 and the outer tube 4, and the electronic extensometer 1 and the extension tube are fixed by rubber bands. After the test is started, the deformation of the member drives the telescopic pipe to deform, and the deformation of the member can be measured through the electronic extensometer 1 erected at the interface of the inner pipe 3 and the outer pipe 4.
The beneficial effect of this embodiment is: by adopting the telescopic pipe, the measurement requirements of members with different sizes can be met without replacing the electronic extensometer 1, the test range is wider, and the economic benefit is good; the upper and lower knife edges of the electronic extensometer 1 are respectively clamped with the inner copper tube and the knife edge clamping groove 8 on the outer copper tube, and the electronic extensometer 1 is fixed with the inner tube 3 and the outer tube 4 by rubber bands, so that the experimental error caused by the fact that the knife edge 2 of the extensometer is not firmly fixed can be reduced. The inner tube 3 and the outer tube 4 have certain diameter difference, and lubricating oil is smeared on the inner tube 3 and the outer tube 4 during use so as to reduce experimental errors caused by tube wall friction, and the requirement for meeting the test precision is guaranteed.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (4)

1. The utility model provides a variable range finding's extensometer test support which characterized in that: including flexible pipe, flexible pipe is equipped with fixing support including the inner tube and the outer tube of pegging graft each other on inner tube and the outer tube, and the equal slip cap is equipped with locating support on the fixing support, still be provided with the expansion bracket edge of a knife on the fixing support, two expansion bracket edge of a knife parallel arrangement, the junction of inner tube and outer tube is provided with the electron extensometer, be provided with a pair of extensometer edge of a knife on the electron extensometer, a plurality of edge of a knife draw-in grooves of equipartition on inner tube and the outer tube lateral wall, two extensometers edges of a knife are connected fixedly with the edge of a knife.
2. A variable range extensometer test stand of claim 1 characterized in that: the positioning assembly is a positioning bolt.
3. A variable range extensometer test stand of claim 1 characterized in that: the outer wall of the inner pipe is provided with a guide rail groove, and the inner wall of the outer pipe is provided with a guide rail.
4. A variable range extensometer test stand of claim 1 characterized in that: the inner pipe and the outer pipe are both copper pipes.
CN202010640277.6A 2020-07-06 2020-07-06 Extensometer test support with variable distance measurement function Pending CN111854674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010640277.6A CN111854674A (en) 2020-07-06 2020-07-06 Extensometer test support with variable distance measurement function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010640277.6A CN111854674A (en) 2020-07-06 2020-07-06 Extensometer test support with variable distance measurement function

Publications (1)

Publication Number Publication Date
CN111854674A true CN111854674A (en) 2020-10-30

Family

ID=73152432

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010640277.6A Pending CN111854674A (en) 2020-07-06 2020-07-06 Extensometer test support with variable distance measurement function

Country Status (1)

Country Link
CN (1) CN111854674A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1375688A (en) * 2002-04-19 2002-10-23 中国地质大学(武汉) New extensometer-using method
CN2816793Y (en) * 2005-09-09 2006-09-13 上海新三思计量仪器制造有限公司 Large-scale distance extensometer
CN201331477Y (en) * 2009-01-09 2009-10-21 陈红秋 Test device of enlarging test range of the extensometer
CN202166574U (en) * 2011-07-15 2012-03-14 中国石油天然气集团公司 Separate extensometer for tensile test stress-strain full curve
KR20130134337A (en) * 2012-05-30 2013-12-10 현대제철 주식회사 Extensometer for fatigue testing device
CN203337456U (en) * 2013-06-27 2013-12-11 攀钢集团成都钢钒有限公司 Extensometer type displacement detecting device
CN207318214U (en) * 2016-12-08 2018-05-04 江苏苏博特新材料股份有限公司 A kind of adjustable reinforced bar sleeve grouting jointing deformation performance test device of gauge length

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1375688A (en) * 2002-04-19 2002-10-23 中国地质大学(武汉) New extensometer-using method
CN2816793Y (en) * 2005-09-09 2006-09-13 上海新三思计量仪器制造有限公司 Large-scale distance extensometer
CN201331477Y (en) * 2009-01-09 2009-10-21 陈红秋 Test device of enlarging test range of the extensometer
CN202166574U (en) * 2011-07-15 2012-03-14 中国石油天然气集团公司 Separate extensometer for tensile test stress-strain full curve
KR20130134337A (en) * 2012-05-30 2013-12-10 현대제철 주식회사 Extensometer for fatigue testing device
CN203337456U (en) * 2013-06-27 2013-12-11 攀钢集团成都钢钒有限公司 Extensometer type displacement detecting device
CN207318214U (en) * 2016-12-08 2018-05-04 江苏苏博特新材料股份有限公司 A kind of adjustable reinforced bar sleeve grouting jointing deformation performance test device of gauge length

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