CN213580530U - Detection device for pressure testing machine - Google Patents
Detection device for pressure testing machine Download PDFInfo
- Publication number
- CN213580530U CN213580530U CN202022303187.6U CN202022303187U CN213580530U CN 213580530 U CN213580530 U CN 213580530U CN 202022303187 U CN202022303187 U CN 202022303187U CN 213580530 U CN213580530 U CN 213580530U
- Authority
- CN
- China
- Prior art keywords
- strain
- column
- testing machine
- baffle
- plate
- 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.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A detection device for a compression testing machine comprises a strain column, an auxiliary pressure plate, four barrier strips and a plurality of groups of strain gauges, wherein the four barrier strips enclose a square frame, and the width of the square frame is the sum of the diameter of the strain column and the thickness of the two barrier strips; the strain columns are vertically placed on the auxiliary pressing plate in the square frame, 0, 1 or 2 baffle bars are placed between the inner side of each baffle and the outer wall of each strain column to limit the strain columns in the front, back, left and right directions, and the vertical positions of the strain columns on the auxiliary pressing plate are adjusted by changing the distribution positions of the four baffle bars, so that the central axes of the strain columns coincide with or deviate from the center of the square frame. The utility model limits the position of the strain column through the matching of the baffle and the stop bar, thereby being convenient for adjusting the vertical position on the auxiliary pressing plate of the strain column; and the inclination test and the strain body center offset test of the spherical pressure head can be realized so as to meet different test requirements.
Description
Technical Field
The utility model relates to a detecting instrument field, concretely relates to a device for detecting concrete compression testing machine's sphere pressure head leveling performance.
Background
The concrete compression test is the most common test in the field of construction engineering quality supervision and control and is mainly used for verifying and evaluating the strength of concrete. In actual work, the result of the concrete compression test has great discreteness, and some outlier data often appear. This phenomenon is not a case, but rather a relatively common phenomenon. Through test analysis of batch concrete samples, the damage forms of the concrete samples are often varied when the compression test results of the same group of concrete samples are much smaller. When the concrete or core sample is subjected to pressure applied by an upper pressure plate and a lower pressure plate of a pressure testing machine, if the pressure of the pressure plate on one part in a compression area is large and the pressure of the pressure plate on the other part is small, the cross section of the part with large pressure is firstly damaged, the part with small pressure is damaged after delay, and the formed damage mode is that the surface which is firstly damaged presents a vertical crack and the surface which is damaged after delay presents a horizontal crack. Because the time of the same cross section damage does not occur simultaneously, the peak force causing the sample damage is usually much smaller, and the compression strength of the sample cannot be truly reflected.
Therefore, a detection device for effectively detecting the leveling performance of the spherical indenter of the concrete pressure testing machine is needed, so that the concrete pressure testing machine can reach the test standard required by europe, and the product quality of the concrete pressure testing machine is improved.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a detection device for compression testing machine to solve the current not good enough technical problem of detection technique to concrete compression testing machine's spherical pressure head leveling performance.
In order to achieve the above object, the utility model provides a detection device for compression testing machine, including strain column, supplementary clamp plate, four blend stops and multiunit foil gage, wherein:
the strain column is a cylinder, the periphery of the auxiliary pressure plate is provided with a raised baffle respectively, the four baffles form a square frame in an enclosing manner, and the width of the square frame is the sum of the diameter of the strain column and the thickness of the two stop bars; the strain columns are vertically placed on the auxiliary pressing plate in the square frame, 0, 1 or 2 baffle strips are placed between the inner side of each baffle and the outer wall of each strain column to limit the strain columns in the front, back, left and right directions, and the vertical positions of the strain columns on the auxiliary pressing plate are adjusted by changing the distribution positions of the four baffle strips so that the central axes of the strain columns coincide with or deviate from the center of the square frame;
the multiple groups of strain gauges are arranged on the column wall of the strain column at intervals around the strain column, are used for being electrically connected with an external measuring instrument, and are used for detecting the deformation of different parts of the strain column and transmitting detection signals to the measuring instrument;
the utility model discloses a concrete pressure testing machine's test instrument, including concrete pressure testing machine's pressure cylinder, auxiliary pressure plate, stress column, auxiliary pressure plate, the support of placing on concrete pressure testing machine's pressure cylinder in the testing process, drive the stress column when auxiliary pressure plate receives the thrust that the pressure cylinder was applyed and remove, make the top of stress column and concrete pressure testing machine's sphere pressure head contact and extrude each other to make the foil gage produce deformation, the multiunit foil gage is respectively with corresponding measured data output to measuring instrument, with the detection of realization sphere pressure head leveling performance.
As a further preferred technical scheme of the utility model, supplementary clamp plate is the square, the baffle passes through screw locking to be fixed on supplementary clamp plate's edge, every the baffle each corresponds a marginal of supplementary clamp plate.
As a further preferred technical scheme of the utility model, four the baffle with supplementary clamp plate integrated into one piece.
As a further preferred technical scheme of the utility model, the cylinder of foil gage encloses all around and is equipped with the protection casing, multiunit foil gage shroud is in the protection casing.
As a further preferred technical scheme of the utility model, install the line plug on the safety cover, the multiunit foil gage with the line plug passes through connection of electric lines, the line plug is used for inserting even plug on the measuring instrument.
As a further preferred technical scheme of the utility model, the foil gage is four groups, four groups the foil gage is divided and is established on the lateral wall all around of strain column, and in the testing process, every group foil gage respectively is unanimous with a baffle direction.
As a further preferred technical scheme of the utility model, the width of square frame is 112mm, the thickness of shelves strip is 6mm, the diameter of strain column is 100 mm.
The utility model discloses a detection apparatus for be used for compression testing machine, through adopting above-mentioned scheme, can reach following beneficial effect:
1) the baffle plate is matched with the stop strip to limit the position of the strain column, the structure is ingenious, and the vertical position on the auxiliary pressure plate of the strain column can be conveniently adjusted;
2) the inclination test and the strain body center offset test of the spherical pressure head can be realized so as to meet different test requirements;
3) the multiple groups of strain gauges can respectively detect the deformation conditions of different parts of the strain columns, and can truly reflect the compressive strength of the sample.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of an example provided by the detection device for a compression testing machine of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic diagram of the device of the present invention applied to a concrete pressure tester for detecting the leveling performance of a spherical pressure head;
fig. 4 is a flow chart of the detection method of the detection device for the compression testing machine of the present invention;
FIG. 5 is a schematic diagram of the apparatus of the present invention performing a ball indenter tilt test on a concrete pressure tester;
fig. 6 is a schematic diagram of the device of the utility model for performing the strain body center offset test on the concrete pressure testing machine.
In the figure: 1. the device comprises a strain column, 2, a protective cover, 3, a strain sheet, 4, a connecting line plug, 5, a stop bar, 6, a baffle, 7 and an auxiliary pressure plate;
100. the concrete pressure tester comprises a concrete pressure tester 101, a spherical pressure head 102, a pressurizing oil cylinder 103, a frame 200 and a measuring instrument.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for the sake of clarity only, and are not intended to limit the scope of the invention, its relative relationship between the terms and their derivatives, and the scope of the invention should be understood as being limited by the claims.
As shown in fig. 1 and fig. 2, the device for detecting the leveling performance of the spherical indenter 101 of the concrete pressure tester 100 comprises a strain column 1, an auxiliary pressure plate 7, four barrier strips and a plurality of groups of strain gauges 3, wherein:
the strain column 1 is a cylinder, the periphery of the auxiliary pressure plate 7 is respectively provided with a raised baffle 6, the four baffles enclose to form a square frame, and the width of the square frame is the sum of the diameter of the strain column 1 and the thickness of the two stop bars 5; the strain columns 1 are vertically placed on the auxiliary pressure plate 7 in the square frame, 0, 1 or 2 barrier strips 5 are placed between the inner side of each baffle 6 and the outer wall of each strain column 1 to limit the positions of the strain columns 1 in front, back, left and right directions, and after all four barrier strips are placed, the positions of the strain columns 1 on the auxiliary pressure plate 7 are limited, so that the strain columns cannot be moved in front, back, left and right directions, and the subsequent testing precision is improved conveniently;
the vertical position of the strain column 1 on the auxiliary pressure plate 7 is adjusted by changing the distribution positions of the four baffle bars 5, so that the central axis of the strain column 1 is coincided with or deviated from the center of the square frame, and the test requirements under different states are met;
the multiple groups of strain gauges 3 are arranged on the column wall of the strain column 1 at intervals around the strain column 1, the multiple groups of strain gauges 3 are used for being electrically connected with an external measuring instrument 200, the multiple groups of strain gauges 3 are used for detecting the deformation of different parts of the strain column 1 and transmitting detection signals to the measuring instrument 200, and it is to be noted that the strain gauges 3 belong to conventional products in the existing deformation testing field, the specific structure and principle of the strain gauges, and the measuring instrument 200 is an electric instrument matched with the strain gauges 3, and detailed description is omitted here;
as shown in fig. 3, the concrete pressure testing machine 100 is composed of a frame 103, a spherical pressure head 101 and a pressurizing oil cylinder 102, the spherical pressure head 101 and the pressurizing oil cylinder 102 are arranged in the frame 103 in a vertical opposite manner, the thrust direction of the pressurizing oil cylinder 102 points to the spherical pressure head 101, the auxiliary pressure plate 7 is used for being placed on the pressurizing oil cylinder 102 of the concrete pressure testing machine 100 and supporting the strain column 1, in the detection process, when the auxiliary pressure plate 7 is subjected to the thrust exerted by the pressurizing oil cylinder 102, the strain column 1 is driven to move, so that the top of the strain column 1 is in contact with and mutually pressed by the spherical pressure head 101 of the concrete pressure testing machine 100, and therefore the strain gauges 3 are deformed, and the plurality of sets of strain gauges 3 respectively output corresponding detection data to the measuring instrument 200, so as to realize the detection of the leveling performance.
In an embodiment, the auxiliary pressing plate 7 is square, the baffle plates 6 are fixed on the edges of the auxiliary pressing plate 7 through screw locking, and each baffle plate 6 corresponds to one edge of the auxiliary pressing plate 7.
In another embodiment, four baffles 6 and the auxiliary pressing plate 7 are integrally formed, that is, the baffles 6 and the auxiliary pressing plate 7 can be processed by a complete plate, and the size of a square frame formed by enclosing the baffles 6 can be more accurate.
In the specific implementation, the cylinder of foil gage 1 encloses all around and is equipped with protection casing 2, 3 covers in protection casing 2 of multiunit foil gage, and protection casing 2 is used for advancing the protection to foil gage 3. The protective cover 2 is provided with a connecting line plug 4, the plurality of groups of strain gauges 3 are connected with the connecting line plug 4 through wires, and the connecting line plug 4 is used for being connected with a plug on the measuring instrument 200 in an inserting mode.
In specific implementation, the four groups of strain gauges 3 are arranged on the front, rear, left and right side walls of the strain column 1, and in the test process, each group of strain gauges 3 is consistent with one baffle 6 in direction, so that deformation of the strain column 1 in the front, rear, left and right directions can be detected, and the detection precision is improved.
In one embodiment, the width of the box is 112mm, the thickness of the bars 5 is 6mm, and the diameter of the strain column 1 is 100mm, i.e. the width of the box is the sum of the diameter of the strain column 1 and the thickness of the two bars 5. Of course, the frame, the stop bars 5 and the strain columns 1 can be designed in other sizes according to requirements.
In order to further understand the invention of the present invention, the following provides a detection method of the device for detecting the leveling performance of the spherical indenter 101 of the concrete pressure tester 100, as shown in fig. 4, the detection method comprises the following steps:
step S100, placing an auxiliary pressure plate 7 on a pressurizing oil cylinder 102 between a spherical pressure head 101 and the pressurizing oil cylinder 102 of the concrete pressure testing machine 100, placing a strain column 1 on the auxiliary pressure plate 7, and enabling the top of the strain column 1 to be opposite to the spherical pressure head 101 of the concrete pressure testing machine 100;
step S200, adjusting the state of the spherical pressure head 101 and adjusting the vertical position of the strain column 1 on the auxiliary pressure plate 7;
step S300, starting a pressurizing oil cylinder 102 to enable the top of the strain column 1 to be in contact with and extrude a spherical pressure head 101 of the concrete pressure testing machine 100, so that strain gauges 3 are deformed, and corresponding detection data are output to a measuring instrument 200 through a plurality of groups of strain gauges 3 to realize the detection of the leveling performance of the spherical pressure head 101;
and S400, repeating the steps S200 and S300 to respectively detect the leveling performance of the spherical pressure head 101 under the condition that the spherical pressure head 101 is in different states and the strain columns 1 are in different positions, and finally obtaining the leveling performance characterization data of the spherical pressure head 101.
In a specific implementation, the step S200 specifically includes:
as shown in fig. 5, in the inclination test of the spherical indenter 101, the distribution positions of four stop bars 5 are changed, one stop bar 5 is placed between each stop plate and the strain column 1, so that the central axis of the strain column 1 erected on the auxiliary pressure plate 7 coincides with the center of the square frame, in this state, the spherical indenter 101 is adjusted to be in an inclined state, and the inclination direction of the spherical indenter 101 faces the direction (facing A, B, C, D) of each stop plate, and the leveling performance is detected once through step S300;
as shown in fig. 6, in the strain body center offset test, the spherical indenter 101 is adjusted to be in a horizontal state, and in this state, the distribution positions of four bars 5 are changed, two bars 5 are placed in parallel between the one side of the bar and the strain column 1, the one side of the bar corresponding to the side of the bar directly abuts against the strain column 1, and one bar 5 is placed between the other two side of the bar and the strain column 1, so that the center axis of the strain column 1 standing on the auxiliary pressure plate 7 is offset from the center of the square frame, and the center axis of the strain column 1 is offset in the direction (toward A, B, C, D) of each bar, and the leveling performance is measured in step S300, and the distance from the center axis of the strain column 1 to the center of the square frame at each time is equal to the thickness of the bar 5.
The strain gauges 3 are four groups, four groups of strain gauges 3 are respectively arranged on the front, rear, left and right side walls of the strain column 1, in the testing process, each group of strain gauges 3 is consistent with one baffle 6 in direction, for convenience of description, the four baffles are respectively marked as A, B, C, D according to distribution directions (distributed in the front, rear, left and right directions of the strain column 1), the four groups of strain gauges 3 are respectively marked as 1, 2, 3 and 4 according to the distribution directions, A and 1 are positioned on the same side, B and 2 are positioned on the same side, C and 3 are positioned on the same side, and D and 4 are positioned on the same side.
In the test, the output value of the group strain gauge 3 can be read out by the measuring instrument 200 with the pressure of the top of the strain column 1 against the spherical indenter 101 of the concrete pressure tester 100 set to 200kN, and the detection data in the tilt test is shown in table 1 and the detection data in the center shift test is shown in table 2.
TABLE 1 spherical indenter 101 Tilt test detection data example
Analyzing the table, and judging the detection result: the repeatability of the strain rate is less than or equal to 0.10; the average value of the strain rate is within +/-0.10.
TABLE 2 center shift test Performance data examples
According to the EN12390-4 standard requirements, various parameters corresponding to the leveling performance of the compression testing machine meet the requirements of the following table 3:
TABLE 3 maximum allowable value of each parameter corresponding to leveling performance of concrete pressure tester 100
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many changes and modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (7)
1. The utility model provides a detection device for compression testing machine, its characterized in that, includes strain column, supplementary clamp plate, four blend stops and multiunit foil gage, wherein:
the strain column is a cylinder, the periphery of the auxiliary pressure plate is provided with a raised baffle respectively, the four baffles form a square frame in an enclosing manner, and the width of the square frame is the sum of the diameter of the strain column and the thickness of the two stop bars; the strain columns are vertically placed on the auxiliary pressing plate in the square frame, 0, 1 or 2 baffle strips are placed between the inner side of each baffle and the outer wall of each strain column to limit the strain columns in the front, back, left and right directions, and the vertical positions of the strain columns on the auxiliary pressing plate are adjusted by changing the distribution positions of the four baffle strips so that the central axes of the strain columns coincide with or deviate from the center of the square frame;
the multiple groups of strain gauges are arranged on the column wall of the strain column at intervals around the strain column, are used for being electrically connected with an external measuring instrument, and are used for detecting the deformation of different parts of the strain column and transmitting detection signals to the measuring instrument;
the utility model discloses a concrete pressure testing machine's test instrument, including concrete pressure testing machine's pressure cylinder, auxiliary pressure plate, stress column, auxiliary pressure plate, the support of placing on concrete pressure testing machine's pressure cylinder in the testing process, drive the stress column when auxiliary pressure plate receives the thrust that the pressure cylinder was applyed and remove, make the top of stress column and concrete pressure testing machine's sphere pressure head contact and extrude each other to make the foil gage produce deformation, the multiunit foil gage is respectively with corresponding measured data output to measuring instrument, with the detection of realization sphere pressure head leveling performance.
2. The detection device for the compression testing machine according to claim 1, wherein the auxiliary pressure plate is square, the baffle plates are fixed on the edge of the auxiliary pressure plate through screw locking, and each baffle plate corresponds to one edge of the auxiliary pressure plate.
3. The detecting device for a compression testing machine according to claim 1, wherein the four blocks of the baffle plate are integrally formed with the auxiliary pressure plate.
4. The detection device for the compression testing machine as claimed in claim 1, wherein a protective cover is arranged around the cylinder of the strain column, and the groups of strain gauges are covered in the protective cover.
5. The detection device for the compression testing machine as claimed in claim 4, wherein a wiring plug is mounted on the protective cover, the multiple groups of strain gauges are connected with the wiring plug through wires, and the wiring plug is used for being plugged into a plug on the measuring instrument.
6. The detecting device for the compression testing machine as claimed in any one of claims 1 to 5, wherein the strain gauges are four groups, four groups of strain gauges are respectively arranged on the front, rear, left and right side walls of the strain column, and each group of strain gauges is in the same direction as one baffle plate during the testing process.
7. The testing device for the compression testing machine according to any one of claims 1 to 5, wherein the width of the frame is 112mm, the thickness of the stop bar is 6mm, and the diameter of the strain column is 100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022303187.6U CN213580530U (en) | 2020-10-15 | 2020-10-15 | Detection device for pressure testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022303187.6U CN213580530U (en) | 2020-10-15 | 2020-10-15 | Detection device for pressure testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213580530U true CN213580530U (en) | 2021-06-29 |
Family
ID=76524442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022303187.6U Active CN213580530U (en) | 2020-10-15 | 2020-10-15 | Detection device for pressure testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213580530U (en) |
-
2020
- 2020-10-15 CN CN202022303187.6U patent/CN213580530U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110220780A (en) | Mechanical property test system and test method for square battery | |
| CN211121865U (en) | Universal circuit board clamp for vibration test board | |
| CN112113876A (en) | Detection device and detection method for pressure testing machine | |
| CN108592851B (en) | Workpiece symmetry detection tool and detection method | |
| CN213580530U (en) | Detection device for pressure testing machine | |
| CN108225161A (en) | A kind of device for measuring metal thick plate residual stress release deflection | |
| CN108534970B (en) | High-precision linear guide rail pair static stiffness comprehensive measurement device and method | |
| CN108398111B (en) | Soft packet of lithium ion power battery thickness measurement equipment | |
| CN107589031B (en) | Check-up draws and presses reaction frame | |
| CN210533642U (en) | Normal and tangential contact rigidity measuring device of joint surface | |
| CN109764990B (en) | Method for detecting die cutting pressure by using die cutting machine pressure testing device | |
| CN218411520U (en) | Bolt detector | |
| CN114713661B (en) | Method for repairing stamping die by referring to workpiece rebound parameters | |
| CN212059716U (en) | Stainless steel product tensile strength detection device | |
| CN213517194U (en) | Acceleration sensor detection device based on comparison | |
| CN114719717A (en) | Die repairing method of stamping die | |
| CN219319971U (en) | Fan motor installation strength testing device | |
| CN113933160A (en) | Biaxial tension test machine | |
| CN112082462A (en) | Quick flatness/offset detection device | |
| CN114839057B (en) | Intelligent mineral experiment device and method | |
| CN219347588U (en) | Digital display type quick height inspection tool for swinging rod | |
| CN218765045U (en) | Comprehensive detection tool for rapidly detecting profile tolerance and distance | |
| CN218155845U (en) | Dual-purpose steering wheel skeleton examines utensil | |
| CN215727604U (en) | Clamp of direct-reading spectrometer | |
| CN217211371U (en) | Point-supported type glass curtain wall claw bearing capacity testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |