CN107179189B - Large-scale load test device - Google Patents
Large-scale load test device Download PDFInfo
- Publication number
- CN107179189B CN107179189B CN201710581425.XA CN201710581425A CN107179189B CN 107179189 B CN107179189 B CN 107179189B CN 201710581425 A CN201710581425 A CN 201710581425A CN 107179189 B CN107179189 B CN 107179189B
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- China
- Prior art keywords
- pressing device
- load
- test platform
- hydraulic jack
- workpiece
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- 238000012360 testing method Methods 0.000 title claims abstract description 89
- 238000003825 pressing Methods 0.000 claims abstract description 69
- 239000002184 metal Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 238000003754 machining Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- 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
- G01N3/02—Details
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Abstract
The invention provides a large-scale load test device which sequentially comprises a first pressing device (1), a hydraulic jack (2), a force transducer (3), a second pressing device (4) and a test platform (5) from top to bottom. The invention also provides a using method of the device, which comprises the steps of installing the first pressing device (1), the force transducer (2), the hydraulic jack (3), the second pressing device (4), the workpiece (6) and the test platform (5), driving the hydraulic jack (3) to press, monitoring the load reading of the force transducer (2), stopping pressing, maintaining pressure, and releasing pressure of the hydraulic jack (3) after the pressure maintaining is finished. The load test device is high in universality, and meanwhile, the load test can be safely, effectively and controllably completed, so that the product is ensured to meet the manufacturing requirement.
Description
Technical Field
The invention relates to a load test device, in particular to a large-scale load test device.
Background
The load test is an important index for checking the quality and safety performance of a workpiece product, and can not only detect the deformation condition of the structure when the workpiece is loaded, but also judge the actual bearing capacity of the workpiece structure, verify the feasibility of the design theory and design method of the workpiece structure, detect the crack condition of the workpiece, connect loose condition and the like.
At present, many manufacturing units and related using units do not conduct intensive studies on load test procedures, required conditions, test devices and the like, and tests are performed blindly, so that the test cannot achieve the expected purpose, and irreparable damage is caused to workpieces.
Therefore, it is necessary to design a set of load test device to effectively ensure the safe, controllable and effective performance of the load test.
Disclosure of Invention
In order to solve the problems, the inventor has conducted intensive studies and devised a large-scale load test apparatus comprising, in order from top to bottom, a first pressing device, a load cell, a hydraulic jack, a second pressing device and a test platform, which can effectively ensure safe, controllable and effective performance of a load test, thereby completing the present invention.
The object of the invention is to provide the following aspects:
in a first aspect, the present invention provides a large-scale load test apparatus comprising, in order from top to bottom, a first pressing device 1, a load cell 2, a hydraulic jack 3, a second pressing device 4, and a test platform 5, wherein,
the lower end surface of the first pressing device 1 is in contact with the upper end surface of the load cell 2, the load cell 2 can be reinforced by the first pressing device 1,
the force transducer 2 is positioned between the first pressure applying device 1 and the hydraulic jack 3, and the lower end surface of the force transducer is contacted with the upper end surface of the hydraulic jack 3.
In the invention, a supporting column 21 is arranged between the test platform 5 and the first pressing device 1, the first pressing device 1 is connected with the test platform 5 through the supporting column 21,
in the present invention, the lower end surface of the hydraulic jack 3 is in contact with the upper end surface of the second pressing means 4,
in the present invention, the test platform 5 may support a workpiece 6 to be measured,
the lower end face of the second pressing means 4 is in contact, preferably fully abutting contact,
the upper end surface of the test platform 5 is in contact with the lower end surface of the workpiece 6.
In the present invention, one end of the supporting column 21 is disposed at the bottom of the first pressing device 1, the other end is disposed at the upper portion of the test platform 5,
preferably, the first pressing device 1 and the test platform 5 form a door-shaped structure through the supporting columns 21, the force transducer 2, the hydraulic jack 3, the second pressing device 4 and the workpiece 6 are all arranged in the door-shaped structure, the force transducer 2, the hydraulic jack 3, the second pressing device 4 and the workpiece 6 are reinforced through the door-shaped structure,
in a second aspect, the present invention also provides a method for using the load test apparatus, including the following steps:
step (1), a first pressing device 1, a force transducer 2, a hydraulic jack 3, a second pressing device 4, a workpiece 6 and a test platform 5 are installed;
step (2), driving a hydraulic jack 3 to apply pressure, and monitoring the load reading of a force transducer 2;
step (3), stopping pressurizing and maintaining pressure;
and (4) after the pressure maintaining is finished, the hydraulic jack 3 is used for pressure relief.
The large-scale load test device provided by the invention has the following beneficial effects:
(1) The load test device provided by the invention has a simple structure, is convenient to operate, and is used for reinforcing the overall stability of the device by fixedly connecting the first pressing device with the test platform.
(2) The load test device provided by the invention can effectively ensure that the load test is safely, controllably and effectively carried out.
(3) The load test device provided by the invention has strong universality, can be designed according to load test requirements, and can be used for load control and pressure maintaining for components which are difficult to measure such as a secondary side manhole hanging shaft component, a supporting ear hanging shaft component, a transportation saddle and the like of a steam generator.
Drawings
FIG. 1 is a schematic view showing the overall structure of a load test apparatus;
FIG. 2 shows a side view of a load testing apparatus;
reference numerals illustrate:
1-first pressing device
2-force cell
3-hydraulic jack
4-second pressing device
5-test platform
6-workpiece
21-support column
Detailed Description
The features and advantages of the present invention will become more apparent and clear from the following detailed description of the invention.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The invention provides a large-scale load test device, which comprises a first pressing device 1, a force transducer 2, a hydraulic jack 3, a second pressing device 4 and a test platform 5 from top to bottom in sequence, as shown in figure 1, wherein,
the lower end surface of the first pressing device 1 is in contact with the upper end surface of the load cell 2, the load cell 2 can be reinforced by the first pressing device 1,
the force transducer 2 is located between the first pressure applying device 1 and the hydraulic jack 3, a supporting column 21 is arranged between the test platform 5 and the first pressure applying device 1, wherein the lower end face of the force transducer contacts with the upper end face of the hydraulic jack 3, the first pressure applying device 1 is connected with the test platform 5 through the supporting column 21, preferably the first pressure applying device 1 is fixedly connected with the test platform 5 through the supporting column 21, and the supporting column 21 is preferably fixedly connected with the test platform 5 and the first pressure applying device 1 through bolts or welding.
In the present invention, the test platform 5 may support a workpiece 6 to be measured,
in a preferred embodiment, the first pressing device 1 is formed by machining a metal plate, preferably by machining a steel plate and/or a channel steel, and more preferably by welding a steel plate and/or a channel steel, and the metal plate has sufficient rigidity and strength so that the first pressing device 1 machined by the first pressing device cannot be greatly deformed during a load test.
In a preferred embodiment, the lower part of the first pressing device 1 is a metal plate having a set length and width so that the first pressing device has a sufficient contact area with the support column 21 and the load cell 2.
In a preferred embodiment, the load cell 2 is located between the first pressure applying device 1 and the hydraulic jack 3, the lower end surface of the load cell is in contact with the upper end surface of the hydraulic jack 3, and the load born by the workpiece is measured by the load cell 2, and the accuracy of the load cell is preferably selected according to the accuracy required by a load test.
In a preferred embodiment, the load cell 2 is provided with a display screen by means of which the magnitude of the load carried by the workpiece 6 is monitored.
In a preferred embodiment, the lower end surface of the hydraulic jack 3 is in contact with the upper end surface of the second pressing means 4, and one or more, preferably 1 to 4, more preferably 1 hydraulic jack 3 is/are provided with a load, preferably a load in the horizontal direction or in the vertical direction, by the hydraulic jack 3.
In a preferred embodiment, the hydraulic jacks 3 are driven by electric pumps, preferably each hydraulic jack 3 is driven by an electric pump alone, the hydraulic jacks 3 can be set to maximum load, boost speed, and dwell time can be set to meet load test dwell time requirements, preferably each hydraulic jack 3 can provide a maximum 600T load.
In a preferred embodiment, the load and number of the hydraulic jacks are determined according to the load required by the workpiece load test, and when more than 2 hydraulic jacks work simultaneously, the pressure rising rate is ensured to be consistent.
In the present invention, the lower end surface of the second pressing device 4 contacts, preferably is in full contact with, the upper end surface of the workpiece 6, the structure of the second pressing device 4 is set according to the structure of the workpiece 6, and the shape of the second pressing device 4 is set according to the shape of the upper end surface of the workpiece 6.
In a preferred embodiment, the second pressing device 4 is formed by machining a metal plate, preferably by machining a steel plate and/or a channel steel, and more preferably by welding a steel plate and/or a channel steel, and the metal plate has sufficient rigidity and strength so that the second pressing device 4 machined by the second pressing device does not deform greatly during a load test.
In a preferred embodiment, when the upper end surface of the workpiece 6 is a concave arc-shaped plane, the lower end surface of the second pressing device 4 is a corresponding convex arc-shaped plane, as shown in fig. 1.
In the present invention, the lower end face of the work 6 is in contact with the upper end face of the test bed 5.
In a preferred embodiment, the specification of the test platform 5 is designed according to the specification and load test requirement of the workpiece 6, and when the workpiece 6 is in a T-shaped structure, the test platform 1 is provided with a corresponding groove structure, as shown in fig. 1, preferably the specification of the test platform 1 is 8000-10000×4000-6000×300-500 mm, more preferably 9000×5500×410mm.
In a preferred embodiment, the test platform 5 is formed from sheet metal, preferably from sheet steel and I-steel, which is capable of withstanding load pressure and has sufficient strength to avoid unacceptable deformation during load testing, more preferably from sheet steel and I-steel, and even more preferably from 80mm sheet steel and HW 300X 300I-steel.
In a preferred embodiment, the lower portion of the test platform 5 is a bottom plate having a set length and width so that the test platform 5 has a sufficient contact area with the support column 21 and the workpiece 6.
In a preferred embodiment, the test platform 5 is provided with kidney-shaped holes and threaded holes, preferably by means of threaded holes and bolts, to a working area fixed working platform, more preferably the working area fixed working platform is provided with T-shaped grooves.
In a preferred embodiment, one end of the supporting column 21 is disposed at the bottom of the first pressing device 1, and the other end is disposed at the upper portion of the test platform 5, preferably, the first pressing device 1 and the test platform 5 form a "door" structure through the supporting column 21, the load cell 2, the hydraulic jack 3, the second pressing device 4 and the workpiece 6 are all installed in the "door" structure, and the load cell 2, the hydraulic jack 3, the second pressing device 4 and the workpiece 6 are reinforced through the "door" structure, so that the components in the load test cannot displace, as shown in fig. 2, and the "door" structure has enough rigidity to avoid unacceptable deformation of the device during the load test.
In a preferred embodiment, the number of the support columns 21 is plural, preferably 2 to 6, more preferably 2, and even more preferably the support columns 21 are symmetrically disposed on both front and rear sides of the device.
The invention also provides a use method of the large-scale load test device, which comprises the following steps:
step (1), a first pressing device 1, a force transducer 2, a hydraulic jack 3, a second pressing device 4, a workpiece 6 and a test platform 5 are installed;
in the present invention, the test platform 5 is fixed first, then the first pressing device 1 is preferably installed, more preferably the first pressing device 1 and the test platform 5 are fixedly connected through the supporting column 21, particularly preferably the first pressing device 1 and the test platform 5 are welded into a "door" shaped structure through the supporting column 21, and then the workpiece 6, the second pressing device 4, the hydraulic jack 3 and the load cell 2 are installed sequentially from bottom to top.
In a preferred embodiment, after the first pressing device 1 and the test platform 5 are assembled and welded into a "door" structure, the workpiece 6, the second pressing device 4, the hydraulic jack 3 and the load cell 2 are placed in the "door" structure in sequence from bottom to top.
In a preferred embodiment, the load cell 2 is calibrated for accuracy prior to use to ensure accuracy of the load test.
Step (2), driving a hydraulic jack 3 to apply pressure, and monitoring the load reading of a force transducer 2;
in a preferred embodiment, the hydraulic jack 3 is slowly pressurized by an electric pump and the load reading is monitored by a display screen connected to the load cell 2.
Step (3), stopping pressurizing and maintaining pressure;
in a preferred embodiment, the readings of the load cell 2 are observed until the load reading reaches or is slightly higher than the load test demand load, whereupon the shut-off valve of the hydraulic jack 3 is closed for dwell, preferably dwell for 6-20 min, more preferably dwell for 10min.
And (4) after the pressure maintaining is finished, the hydraulic jack 3 is used for pressure relief.
In a preferred embodiment, the hydraulic jack 3 is depressurized and the work piece 6 is subjected to a nondestructive inspection.
The invention has been described in detail in connection with the specific embodiments and exemplary examples thereof, but such description is not to be construed as limiting the invention. It will be understood by those skilled in the art that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, and these fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. A large-scale load test device is characterized by comprising a first pressing device (1), a load cell (2), a hydraulic jack (3), a second pressing device (4) and a test platform (5) from top to bottom in sequence,
the lower end face of the first pressing device (1) is contacted with the upper end face of the force transducer (2), the force transducer (2) can be reinforced by the first pressing device (1),
the force transducer (2) is positioned between the first pressing device (1) and the hydraulic jack (3), and the lower end face of the force transducer is contacted with the upper end face of the hydraulic jack (3);
the lower end surface of the hydraulic jack (3) is contacted with the upper end surface of the second pressing device (4),
one or more hydraulic jacks (3) are used for providing load through the hydraulic jacks (3);
the test platform (5) can support a workpiece (6) to be measured,
the lower end surface of the second pressing device (4) is completely in fit contact with the upper end surface of the workpiece (6),
the upper end surface of the test platform (5) is contacted with the lower end surface of the workpiece (6);
a supporting column (21) is arranged between the test platform (5) and the first pressing device (1), and the first pressing device (1) is connected with the test platform (5) through the supporting column (21);
one end of the supporting column (21) is arranged at the bottom of the first pressing device (1), and the other end of the supporting column is arranged at the upper part of the test platform (5);
the first pressing device (1) and the test platform (5) form a door-shaped structure through a support column (21), the force transducer (2), the hydraulic jack (3), the second pressing device (4) and the workpiece (6) are all arranged in the door-shaped structure, the force transducer (2), the hydraulic jack (3), the second pressing device (4) and the workpiece (6) are reinforced through the door-shaped structure,
the support columns (21) are multiple.
2. The load test apparatus according to claim 1, wherein,
the supporting column (21) is fixedly connected with the test platform (5) and the first pressing device (1) through bolts or welding.
3. The load test apparatus according to claim 1, wherein,
the lower part of the first pressing device (1) is a metal plate with a set length and a set width, so that the first pressing device has enough contact area to be in contact with the support column (21) and the load cell (2).
4. The load test apparatus according to claim 1, wherein,
the number of the hydraulic jacks (3) is 1-4, and the hydraulic jacks (3) are used for providing load in the horizontal direction or the vertical direction.
5. The load test apparatus according to claim 1, wherein,
the lower part of the test platform (5) is a bottom plate with a set length and a set width, so that the test platform (5) has enough contact area to be contacted with the support column (21) and the workpiece (6),
the test platform (5) is provided with a waist-shaped hole and a threaded hole, and is connected with the fixed working platform of the working area through the threaded hole and a bolt.
6. Load test device according to claim 1, characterized in that the number of support columns (21) is 2-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710581425.XA CN107179189B (en) | 2017-07-17 | 2017-07-17 | Large-scale load test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710581425.XA CN107179189B (en) | 2017-07-17 | 2017-07-17 | Large-scale load test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107179189A CN107179189A (en) | 2017-09-19 |
| CN107179189B true CN107179189B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710581425.XA Active CN107179189B (en) | 2017-07-17 | 2017-07-17 | Large-scale load test device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116735368B (en) * | 2023-08-16 | 2023-12-01 | 北京城建集团有限责任公司 | Building steel structure strength detection device and detection method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014088689A (en) * | 2012-10-30 | 2014-05-15 | Ssc Pile Association | Loading test method and loading test device for composite reinforcement ground |
| CN105716956A (en) * | 2016-01-28 | 2016-06-29 | 山东大学 | Creep test device and control system thereof |
| CN105784395A (en) * | 2016-03-03 | 2016-07-20 | 南京汽车集团有限公司 | Automobile hydraulic jack endurance test device and test method thereof |
| CN106940271A (en) * | 2017-05-24 | 2017-07-11 | 中山市标致电子科技有限公司 | One kind, which is built, uses spandrel girder loading test device |
| CN206891716U (en) * | 2017-07-17 | 2018-01-16 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of large scale plate loading test device |
-
2017
- 2017-07-17 CN CN201710581425.XA patent/CN107179189B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014088689A (en) * | 2012-10-30 | 2014-05-15 | Ssc Pile Association | Loading test method and loading test device for composite reinforcement ground |
| CN105716956A (en) * | 2016-01-28 | 2016-06-29 | 山东大学 | Creep test device and control system thereof |
| CN105784395A (en) * | 2016-03-03 | 2016-07-20 | 南京汽车集团有限公司 | Automobile hydraulic jack endurance test device and test method thereof |
| CN106940271A (en) * | 2017-05-24 | 2017-07-11 | 中山市标致电子科技有限公司 | One kind, which is built, uses spandrel girder loading test device |
| CN206891716U (en) * | 2017-07-17 | 2018-01-16 | 哈电集团（秦皇岛）重型装备有限公司 | A kind of large scale plate loading test device |
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| Publication number | Publication date |
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| CN107179189A (en) | 2017-09-19 |
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