CN212321272U - Loading device for compression creep test - Google Patents
Loading device for compression creep test Download PDFInfo
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- CN212321272U CN212321272U CN202021729596.6U CN202021729596U CN212321272U CN 212321272 U CN212321272 U CN 212321272U CN 202021729596 U CN202021729596 U CN 202021729596U CN 212321272 U CN212321272 U CN 212321272U
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- loading
- steel
- longitudinal beam
- creep test
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Abstract
The utility model discloses a loading device for compression creep test, including the steel frame, go up the longeron, the loading end, force sensor, C type anchor clamps, the percentage table, the magnetism gauge stand, the supporting pedestal, bolt and longeron down, wherein go up longeron and steel frame welding down, the loading end is by the loading screw rod, the steel sleeve, the lifter, flange and loading block group become, it makes steel sleeve and last longeron welding to bore the round hole in advance at last longeron relevant position, the loading screw rod passes through the flange and links to each other with the loading piece, the lifter passes steel sleeve and loading piece welding, force sensor is under the loading piece, the percentage table links to each other with the magnetism gauge stand and adsorbs on the supporting pedestal, the supporting pedestal welds with C type anchor clamps, be connected with longeron down through the bolt. The utility model has the advantages of the structure is succinct, the simple operation and stability are good, can carry out the compression creep test of a plurality of test pieces simultaneously.
Description
Technical Field
The utility model belongs to civil engineering building structure field, concretely relates to loading device suitable for carry out compression creep test to bar test piece.
Background
The problem of creep is one of the key issues concerned in the field of civil engineering, and creep in materials mainly refers to the phenomenon that strain of a solid material continuously increases with time under the condition of keeping stress unchanged, and serious creep action can cause deformation and fracture of a member, so that the strength of the member or the whole structure is greatly weakened, and the durability and the stability of the structure are influenced. It is distinguished from plastic deformation, which generally occurs after stresses exceed the elastic limit, and creep, which occurs when stresses are less than the elastic limit, as long as the stresses are applied for a relatively long time. The creep characteristic of the material is researched, a creep model of the material is accurately established by applying a creep mechanical theory, and the method has important significance for ensuring the precision durability and the service life of the key bearing component.
The basic premise for accurately establishing a material creep model is to establish an accurate and effective creep test device and a test method. In the existing creep experiment device, power sources such as hydraulic pressure, air pressure and oil pressure are applied, creep characteristic tests of conventional materials, composite materials or novel materials are mainly researched, and creep information of a test piece is collected through an automatic recorder. However, the creep experiment devices are difficult to maintain constant pressure or have too large pressure fluctuation in the pressure holding process, so that the accuracy of test values is affected, and the reliability of experiment data is not high. Meanwhile, the creep test with lower load is difficult to carry out, a plurality of test pieces cannot be loaded simultaneously, the sampling size is large, and the requirements of engineering practice on the accuracy and the sensitivity of the creep test method cannot be met. Therefore, it is necessary to design a creep test device with simple structure, convenient operation, good stability and high experimental reliability.
SUMMERY OF THE UTILITY MODEL
The utility model aims at designing out a simple structure, convenient operation, stability are good and the creep test device that experiment reliability is high, can carry out the load of a plurality of test pieces simultaneously, provide one kind and be applicable to and carry out the loading device that compression creep is experimental to the bar test piece.
The technical scheme of the utility model: a loading device for a compression creep test is composed of a steel frame, an upper longitudinal beam, a loading end, a force sensor, a C-shaped clamp, a dial indicator, a magnetic gauge stand, a supporting pedestal, a bolt and a lower longitudinal beam.
The utility model discloses a theory of operation: the loading screw rod is rotated to drive the lifting rod and the loading block, the pre-tightening force of the screw rod is twisted to enable the loading block to downwards generate certain compressive stress to act on the test piece, and the compressive stress is kept stable after the screw rod is fastened. The steel sleeve plays a role in fixing and enables the lifting rod to keep moving vertically. And adjusting the force according to the data acquired by the force sensor in real time to enable the force to reach the load required by the test. The C-shaped clamp fixes the test piece by screwing the screw rod, and plays a role in preventing the test piece from overturning and enabling the load to vertically act on the center of the test piece. The dial indicator is connected with the magnetic gauge seat and is adsorbed on the supporting pedestal, and the strain of the test piece can be measured in real time by the contact of the dial indicator and the test piece. The supporting pedestal is connected with the lower longitudinal beam through a bolt, so that the supporting pedestal is fixed and prevented from sliding.
The loading device for the compression creep test is characterized in that the upper longitudinal beam and the lower longitudinal beam are welded with the steel frame, the loading end comprises a loading screw, a steel sleeve, a lifting rod, a flange and a loading block, a round hole is pre-drilled at the corresponding position of the upper longitudinal beam to enable the steel sleeve to be welded with the upper longitudinal beam, the loading screw is connected with a loading block through the flange, the lifting rod penetrates through the steel sleeve to be welded with the loading block, the force sensor is arranged below the loading block, the dial indicator is connected with the magnetic gauge stand and adsorbed on the supporting pedestal, the supporting pedestal is welded with the C-type clamp and is connected with the lower longitudinal beam through the bolt.
The upper longitudinal beam and the lower longitudinal beam are welded with the steel frame, the thickness of the upper longitudinal beam and the thickness of the lower longitudinal beam are not less than 50mm, the surface of the steel frame is subjected to anti-rust paint treatment, and the grade of the used steel is Q345.
The loading screw rod is connected with the loading block through a flange, the strength grade of the loading screw rod is not lower than 8.8 grade, the diameter of the loading screw rod is not smaller than 30mm, the flange is made of stainless steel, the loading block is made of steel with the steel grade of Q345, and the thickness of the loading block is not smaller than 15 mm.
The steel sleeves are symmetrically arranged on two sides of the loading screw, the diameter of each steel sleeve is not less than 30mm, the strength of each steel sleeve is not less than 235MPa, the diameter of each lifting rod is not less than 25mm, and the length of each lifting rod is not less than 300 mm.
The dial indicator is connected with the magnetic meter seat and is adsorbed on the supporting pedestal, the measuring range of the dial indicator is 10mm, and the strength of the supporting pedestal is not lower than 235 MPa.
The C-shaped clamp is made of malleable steel, the specification and the model are not less than 4 inches, and the diameter of the screw is not more than 15 mm.
The supporting pedestal is connected with the lower longitudinal beam through bolts, the bolts are symmetrically arranged on two sides of a lower flange of the supporting pedestal, the strength grade is not lower than 8.8 grade, and the diameter is not smaller than 20 mm.
The utility model discloses the structure is succinct, and the construction is convenient, and convenient operation drives lifter and loading piece through rotating the loading screw rod, makes the loading piece produce certain compressive stress downwards and act on the test piece, and compressive stress remains stable after the screw rod fastening, and test piece load is stable in the testing process, and the reliability of creep experiment is higher. The utility model discloses can carry out the loading of a plurality of test pieces simultaneously, save experimental time, improve experimental efficiency greatly.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention.
FIG. 1 is a schematic view of a loading device for a compression creep test.
FIG. 2 is a schematic view of the loading end connection of a loading device for the compressive creep test.
FIG. 3 is a partial configuration view of a loading device for a compression creep test.
FIG. 4 is a schematic diagram of the attachment of an embodiment of a loading device to a test piece for a compressive creep test.
In the figure: 1. the device comprises a steel frame, 2 loading screws, 3 steel sleeves, 4 lifting rods, 5 upper longitudinal beams, 6 flanges, 7 loading blocks, 8 force sensors, 9C-shaped clamps, 10 dial indicators, 11 magnetic gauge seats, 12 supporting pedestal, 13 bolts and 14 lower longitudinal beams.
Detailed Description
Detailed description of the preferred embodiments
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in figure 1, the utility model provides a loading device for compression creep test, including steel frame (1), loading screw (2), steel sleeve (3), lifter (4), last longeron (5), flange (6), loading piece (7), force transducer (8), C type anchor clamps (9), percentage table (10), magnetism gauge stand (11), supporting pedestal (12), bolt (13) and longeron (14) down. The loading device is characterized in that an upper longitudinal beam (5) and a lower longitudinal beam (14) are welded with a steel frame (1), round holes are pre-drilled at corresponding positions of the upper longitudinal beam (5) to enable a steel sleeve (3) to be welded with the upper longitudinal beam (5), the steel sleeve (3) is symmetrically arranged on two sides of a loading screw (2), the loading screw (2) is connected with a loading block (7) through a flange (6), a lifting rod (4) penetrates through the steel sleeve (3) to be welded with the loading block (7), force sensors (8) are arranged below the loading block (7), a dial indicator (10) is connected with a magnetic gauge stand (11) and adsorbed on a supporting pedestal (12), the supporting pedestal (12) is welded with a C-shaped clamp (9) and connected with the lower longitudinal beam (14) through bolts (13), and the bolts (13) are symmetrically arranged on two sides of a lower flange of the supporting pedestal (12), so that the loading device is installed and connected to a computer, loading devices are selected, Conditions are collected, and then data can be loaded and collected until the test is finished.
Example 1: the basic principle and the main structure are the same as the above, the loading device of the compression creep test is connected with a test piece, as shown in fig. 4, the force sensor is connected with a computer, an L-shaped angle steel is adhered on the test piece and fixed through a C-shaped clamp, a dial indicator is in contact with the L-shaped angle steel, and the loading test is carried out by setting the acquisition condition until the test is finished.
Claims (7)
1. A loading device for a compression creep test comprises a steel frame (1), a loading screw (2), a steel sleeve (3), a lifting rod (4), an upper longitudinal beam (5), a flange (6), a loading block (7), a force sensor (8), a C-shaped clamp (9), a dial indicator (10), a magnetic gauge stand (11), a supporting pedestal (12), a bolt (13) and a lower longitudinal beam (14), and is characterized in that the upper longitudinal beam (5) and the lower longitudinal beam (14) are welded with the steel frame (1), a round hole is pre-drilled at the corresponding position of the upper longitudinal beam (5) to weld the steel sleeve (3) and the upper longitudinal beam (5), the loading screw (2) is connected with the loading block (7) through the flange (6), the lifting rod (4) penetrates through the steel sleeve (3) to be welded with the loading block (7), the force sensor (8) is arranged below the loading block (7), the dial indicator (10) is adsorbed on the supporting pedestal (12) with the magnetic gauge stand (11), the supporting pedestal (12) is welded with the C-shaped clamp (9) and is connected with the side sill (14) through a bolt (13).
2. The loading device for the compression creep test according to claim 1, wherein the upper longitudinal beam (5) and the lower longitudinal beam (14) are welded with the steel frame (1), the thickness of the upper longitudinal beam (5) and the thickness of the lower longitudinal beam (14) are not less than 50mm, the surface of the steel frame (1) is subjected to rust-proof paint treatment, and the grade of the steel used is Q345.
3. The loading device for the compression creep test according to claim 1, wherein the loading screw (2) is connected with the loading block (7) through a flange (6), the loading screw (2) has a strength grade of not less than 8.8 and a diameter of not less than 30mm, the flange (6) is made of stainless steel, and the loading block (7) is made of steel with a steel grade of Q345 and has a thickness of not less than 15 mm.
4. The loading device for the compression creep test according to claim 1, characterized in that the steel sleeves (3) are symmetrically arranged at both sides of the loading screw (2), the diameter is not less than 30mm, the strength is not less than 235MPa, the diameter of the lifting rod (4) is not less than 25mm, and the length is not less than 300 mm.
5. The loading device for the compressive creep test according to claim 1, wherein the dial indicator (10) is attached to the magnetic gauge stand (11) and is attached to the support stand (12), the range of the dial indicator (10) is 10mm, and the strength of the support stand (12) is not lower than 235 MPa.
6. The loading device for the compression creep test according to claim 1, wherein the supporting pedestal (12) is welded with a C-shaped clamp (9), the C-shaped clamp (9) is made of malleable steel, the specification is not less than 4 inches, and the diameter of the screw is not more than 15 mm.
7. The loading device for the compressive creep test according to claim 1, wherein the support pedestal (12) is connected with the side sill (14) through bolts (13), the bolts (13) are symmetrically arranged on both sides of the lower flange of the support pedestal, the strength grade is not lower than 8.8, and the diameter is not smaller than 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021729596.6U CN212321272U (en) | 2020-08-14 | 2020-08-14 | Loading device for compression creep test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021729596.6U CN212321272U (en) | 2020-08-14 | 2020-08-14 | Loading device for compression creep test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212321272U true CN212321272U (en) | 2021-01-08 |
Family
ID=74036319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021729596.6U Expired - Fee Related CN212321272U (en) | 2020-08-14 | 2020-08-14 | Loading device for compression creep test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212321272U (en) |
-
2020
- 2020-08-14 CN CN202021729596.6U patent/CN212321272U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20210108 Termination date: 20210814 |