CN111337354A - Cambered surface pressure load loading system - Google Patents
Cambered surface pressure load loading system Download PDFInfo
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- CN111337354A CN111337354A CN202010374193.2A CN202010374193A CN111337354A CN 111337354 A CN111337354 A CN 111337354A CN 202010374193 A CN202010374193 A CN 202010374193A CN 111337354 A CN111337354 A CN 111337354A
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- loading
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- cambered surface
- air bag
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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
- G01N3/08—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
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- 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
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a cambered surface pressure load loading system, including loading system and gasbag loading control system, wherein, loading system includes the steel structure ingot again, restraint anchor clamps, the testpieces guide rail, loading frock, the gasbag, fixed connection through the steel structure ingot constitutes test platform, the test platform right side is equipped with restraint anchor clamps, it has the testpieces guide rail to inlay in the restraint anchor clamps, the last left side of test platform is equipped with loading frock, loading frock bottom is equipped with the gasbag, loading frock is fixed outside the gasbag, gasbag loading control system includes the air supply again, the gas holder, the switch of admitting air, the switch of giving vent to anger, admit air pressure-limiting valve, pressure sensor, programmable controller, the gas vent. The invention effectively solves the problem of external pressure load loading of a large cambered surface structure and the problem of external pressure loading of an irregular curved surface, can realize multi-path uniform slow coordinated loading, can truly simulate the loading condition of the cambered surface structure, ensures the uniformity and accuracy of load application, and enables the external pressure loading of a test piece to be closer to the actual condition.
Description
Technical Field
The invention relates to a large-scale structural strength test, in particular to a cambered surface pressure load loading system.
Background
The ship structure can be acted by water surface load when floating up and down on the water surface, and the influence of the water load on the action position and distribution of the structure is considered according to relevant requirements. The test examination is mainly applied to the test surface of the test piece in a pressure distribution mode. In the strength test of the ship structure, the loading area of the surface of the load action structure is large, the surface is irregular and mainly of a cambered surface structure, and the load needs to be uniformly applied, so that the external pressure strength loading on the large-scale cambered surface structure of the ship has technical difficulties.
The conventional tension and compression pad and hydraulic cylinder loading device cannot meet the requirement of loading of a special-shaped cambered surface, the compression load is large, the working conditions are multiple, and the implementation process of the traditional loading test method is complex, so that a novel loading system needs to be designed to realize normal loading of a large-scale cambered surface structure and guarantee the accuracy and the authenticity of the test.
Disclosure of Invention
According to the technical problems, the invention provides a cambered surface compressive load loading system, which comprises a loading system and an air bag loading control system, wherein the loading system also comprises steel-structure casting blocks, a constraint fixture, a test piece guide rail, a loading tool and an air bag, the number of the steel-structure casting blocks is N, N is more than or equal to 6, a test platform is formed by fixedly connecting the N steel-structure casting blocks, the right side of the test platform is provided with the constraint fixture, the constraint fixture comprises a mounting bottom plate, side plates, a top plate, limit blocks and mounting holes, the mounting bottom plate is fixedly mounted on the test platform through bolts, the number of the side plates is 2, 2 side plates are symmetrically arranged at two sides of the mounting bottom plate, the tops of the side plates are connected through the top plate, the limit blocks are symmetrically arranged at the front and back of the side plate at each side, the limit blocks are provided with the mounting holes, the constraint fixture is a group of 2, the cross section of the test piece guide rail is in a shape consistent with that of the test piece, the constraint fixture is connected with the test piece guide rail by penetrating a bolt through a mounting hole, a loading tool is arranged on the left side of the test platform and fixedly mounted on a steel structure casting block, an air nozzle leading-out hole is reserved on the loading tool, an air bag is arranged at the bottom of the loading tool, two air nozzles, namely an air nozzle I and an air nozzle II, are arranged on the air bag, and the loading tool and the air bag are fixedly clamped by leading out the air nozzle I and the air nozzle II from air nozzle leading-out holes reserved on the loading tool respectively;
the air bag loading control system comprises an air source, an air storage tank, an air inlet switch, an air outlet switch, an air inlet pressure limiting valve, a pressure sensor, a programmable controller and an air outlet, wherein the air source is connected with an air tap I of the air bag through the air storage tank through a pipeline;
the programmable controller is respectively connected with the air inlet switch, the air outlet switch, the air inlet pressure limiting valve and the pressure sensor through pipelines, and controls the opening and closing of the air inlet switch and the air outlet switch through the feedback of the pressure sensor to form closed-loop control.
Further, the loading tool is of a semi-arc structure.
Furthermore, the air bag is made of soft natural rubber materials, and the wall thickness of the air bag is 2 mm.
The air-conditioning system further comprises a flow meter and a barometer, wherein the flow meter and the barometer are 2 groups, one group is arranged on a pipeline between the air inlet pressure limiting valve and the air bag, and the other group is arranged on a pipeline between the air bag and the air outlet switch.
The invention has the beneficial effects that: according to the invention, through the steel-structure casting block, the restraint fixture, the loading tool, the air bag and the air bag loading control system capable of realizing two paths of uniform and coordinated loading, the problem of external pressure load loading of a large-scale cambered surface structure and the problem of external pressure loading of an irregular curved surface are effectively solved, and the applicability is strong; and a coordinated loading system is designed, so that the loading condition of the cambered surface structure can be truly simulated by multi-path uniform slow coordinated loading, the uniformity and accuracy of load application are ensured, and the external pressure loading of the test piece is closer to the actual condition. The invention has simple form, reasonable design and high stability, and can well meet the test requirements.
Drawings
FIG. 1 is a schematic view of the loading system installation of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view of a restraining fixture according to the present invention;
FIG. 4 is a schematic structural view of a test piece guide rail according to the present invention;
FIG. 5 is a schematic structural view of a loading tool according to the present invention;
FIG. 6 is a schematic view of the structure of the bladder of the present invention;
FIG. 7 is a schematic view of the structure of a test piece according to the present invention;
FIG. 8 is a schematic view of the present invention in use;
FIG. 9 is a schematic view of an airbag loading control system of the present invention.
As shown in the figure, the device comprises a steel casting block-1, a constraint clamp-2, an installation bottom plate-201, a side plate-202, a top plate-203, a limiting block-204, an installation hole-205, a test piece guide rail-3, a loading tool-4, an air bag-5, an air nozzle I-501, an air nozzle II-502, an air source-6, an air storage tank-7, an air inlet switch-8, an air outlet switch-9, an air inlet pressure limiting valve-10, a flow meter-11, a pressure sensor-12, an air pressure meter-13, a programmable controller-14, an air outlet-15 and a test piece-16.
Detailed Description
The invention will be further explained with reference to the drawings, in which: the invention relates to a cambered surface compressive load loading system, which comprises a loading system and an air bag loading control system, wherein the loading system also comprises steel casting blocks 1, a restraining clamp 2, a test piece guide rail 3, a loading tool 4 and an air bag 5, the number of the steel casting blocks 1 is N, N is more than or equal to 6, a test platform is formed by fixedly connecting the N steel casting blocks 1, a restraining clamp 2 is arranged at the right side of the test platform, the test platform is composed of a mounting bottom plate 201, side plates 202, a top plate 203, limiting blocks 204 and mounting holes 205, the mounting bottom plate 201 is fixedly mounted on the test platform through bolts, the number of the side plates 202 is 2, the 2 side plates 202 are symmetrically arranged at two sides of the mounting bottom plate 201, the tops of the side plates 202 are connected through the top plate 203, the limiting blocks 204 are symmetrically arranged at the front and back of the side plate 202 at each side, the limiting blocks 204 are provided with the mounting holes 205, the, it has testpieces guide rail 3 to inlay in restraint anchor clamps 2, restraint anchor clamps 2 are connected with testpieces guide rail 3 through passing the bolt mounting hole 205, and restraint anchor clamps 2 main function is analogue test piece boundary condition, testpieces guide rail 3 cross-section is for the shape unanimous with the testpieces, restraint testpieces level and vertical direction degree of freedom, release axial degree of freedom, and the left side is equipped with loading frock 4 on the test platform, loading frock 4 fixed mounting is on steel structure cast block 1, and it has the air cock to draw forth the hole to reserve on it, loading frock 4 bottom is equipped with gasbag 5, and loading frock 4 is fixed outside gasbag 5, guarantees that pressurization back gasbag 5 laminates to foreseeing on applying the face, and gasbag 5 is the experimental atmospheric pressure loading device of static strength, laminates with testpieces loading surface, be equipped with two air cocks on gasbag 5, air cock I, air cock II respectively, through with air cock I501, The air nozzle II502 is respectively led out from an air nozzle leading-out port reserved on the loading tool 4 to realize the fixed clamping connection of the loading tool 4 and the air bag 5;
the air bag loading control system comprises an air source 6, an air storage tank 7, an air inlet switch 8, an air outlet switch 9, an air inlet pressure limiting valve 10, a pressure sensor 12, a programmable controller 14 and an air outlet 15, wherein the air source 6 is connected with an air nozzle I of an air bag 5 through the air storage tank 7 through a pipeline, the air storage tank 7 is used as an air storage device, the air source 6 charges the air storage tank 7 during testing, air enters the air bag through the air storage tank 7 to ensure the stable charging process, the air inlet switch 8 and the air inlet pressure limiting valve 10 are sequentially arranged on the pipeline between the air storage tank 7 and the air bag 5, the air bag 5 is charged when the air inlet switch 8 is opened, the air pressure is limited, the air inlet pressure limiting valve 10 avoids over-high pressure to ensure the safety of the test, the air nozzle II of the air bag 5 is connected with the air outlet 15 through a pipeline, the air outlet switch 9 is arranged, the side surface of the air bag 5 is connected with a pressure sensor 12 through a pipeline, and the pressure sensor 12 is used for controlling and monitoring the pressure of the air bag 5;
the programmable controller 14 is respectively connected with the air inlet switch 8, the air outlet switch 9, the air inlet pressure limiting valve 10 and the pressure sensor 12 through pipelines, and controls the opening and closing of the air inlet switch 8 and the air outlet switch 9 through the feedback of the pressure sensor 12 to form closed-loop control.
Further, the loading tool 4 is of a semi-arc structure.
Furthermore, the air bag 5 is made of soft natural rubber materials, and the wall thickness of the air bag is 2 mm.
The gas-liquid separation device further comprises a flow meter 11 and a barometer 13, wherein the flow meter 11 and the barometer 13 are 2 groups, one group is arranged on a pipeline between the gas inlet pressure limiting valve 10 and the gas bag 5, the other group is arranged on a pipeline between the gas bag 5 and the gas outlet switch 9, the flow meter 11 and the barometer 13 are connected in series in a control system, the flow meter 11 is used for adjusting the gas filling and discharging rate, and the numerical value of the barometer 13 is used for calibrating the feedback of the pressure sensor 12;
the working principle is as follows:
during testing, a steel structure casting block 1 is used for building a test base, a constraint clamp 2 and a loading tool 4 are supported, the constraint clamp 2 is connected with a test piece guide rail 3 through a bolt, boundary conditions of the test piece are simulated, and the horizontal and vertical direction freedom degrees of the test piece are constrained;
the gasbag 5 designs according to the cambered surface structure appearance, and the gasbag adopts soft natural rubber material preparation, guarantees wall thickness 2mm, and rubber distributes evenly, guarantees that airtight should not have sand hole, gas pocket and other impurity. The air bag 5 is fixed through the loading tool 4, and the air bag 5 is ensured to be attached to the expected application surface.
Before the air bag 5 is installed, the air bag is pressurized step by using the control system, so that the stability and the loading precision of the loading system are ensured. After meeting the test requirements, the installation is carried out according to the installation shown in fig. 1 and 2. During testing, the air storage tank 7 is pressurized by the air source 6, and the programmable controller 14 controls the air inlet switch 8 and the air outlet switch 9 through the pressure value fed back by the pressure sensor 12. When the pressure sensor 12 is lower than the set value, the air outlet switch 9 is closed, and the air inlet switch 8 is opened; when the pressure sensor 12 is larger than a set value, the air outlet switch 9 is opened, and the air inlet switch 8 is closed; when the pressure sensor 12 is equal to a set value, the air outlet switch 9 and the air inlet switch 8 are both closed, the pressure meets the test requirement, and the test can be started; the air inlet pressure limiting valve 10 is used for limiting air pressure, and pressure relief is carried out when the pressure is too high, so that the safety of a test is ensured; the flow meter 11 is used to regulate the rate of inflation and deflation. The control system is connected with two barometers 13 in series, and the values of the barometers are used for calibrating the feedback of the pressure sensors, so that the pressure sensors 12 are prevented from generating measurement errors.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (4)
1. A cambered surface compressive load loading system is characterized by comprising a loading system and an air bag loading control system, wherein the loading system further comprises steel structure casting blocks, a restraining fixture, a test piece guide rail, a loading tool and an air bag, the number of the steel structure casting blocks is N, N is more than or equal to 6, a test platform is formed by fixedly connecting the N steel structure casting blocks, the right side of the test platform is provided with the restraining fixture, the restraining fixture comprises a mounting bottom plate, side plates, a top plate, limit blocks and mounting holes, the mounting bottom plate is fixedly mounted on the test platform through bolts, the number of the side plates is 2, the 2 side plates are symmetrically arranged at two sides of the mounting bottom plate, the tops of the side plates are connected through the top plate, the limit blocks are symmetrically arranged at the front and the back of the side plate at each side, mounting holes are formed in the limit blocks, the restraining fixture is a group of 2, the test piece guide rail is, the cross section of the test piece guide rail is in a shape consistent with that of the test piece, the constraint fixture is connected with the test piece guide rail by penetrating a bolt through a mounting hole, a loading tool is arranged on the left side of the test platform and fixedly mounted on a steel structure casting block, an air nozzle leading-out hole is reserved on the loading tool, an air bag is arranged at the bottom of the loading tool, two air nozzles, namely an air nozzle I and an air nozzle II, are arranged on the air bag, and the loading tool and the air bag are fixedly clamped by leading out the air nozzle I and the air nozzle II from air nozzle leading-out holes reserved on the loading tool respectively;
the air bag loading control system comprises an air source, an air storage tank, an air inlet switch, an air outlet switch, an air inlet pressure limiting valve, a pressure sensor, a programmable controller and an air outlet, wherein the air source is connected with an air tap I of the air bag through the air storage tank through a pipeline;
the programmable controller is respectively connected with the air inlet switch, the air outlet switch, the air inlet pressure limiting valve and the pressure sensor through pipelines, and controls the opening and closing of the air inlet switch and the air outlet switch through the feedback of the pressure sensor to form closed-loop control.
2. The cambered surface compressive load loading system of claim 1, wherein said loading tooling is of a semi-arc type configuration.
3. The cambered surface compression load loading system of claim 1 wherein said bladder is formed of a soft natural rubber material having a wall thickness of 2 mm.
4. The cambered surface pressure load loading system according to claim 1, further comprising a flow meter and a barometer, wherein the flow meter and the barometer are 2 groups, one group is arranged on a pipeline between the air inlet pressure limiting valve and the air bag, and the other group is arranged on a pipeline between the air bag and the air outlet switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010374193.2A CN111337354A (en) | 2020-05-06 | 2020-05-06 | Cambered surface pressure load loading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010374193.2A CN111337354A (en) | 2020-05-06 | 2020-05-06 | Cambered surface pressure load loading system |
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| Publication Number | Publication Date |
|---|---|
| CN111337354A true CN111337354A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010374193.2A Pending CN111337354A (en) | 2020-05-06 | 2020-05-06 | Cambered surface pressure load loading system |
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| CN (1) | CN111337354A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129545A (en) * | 2020-09-23 | 2020-12-25 | 中车长春轨道客车股份有限公司 | Car roof car washing working condition loading universal device for car body static strength test |
| CN113295536A (en) * | 2021-05-21 | 2021-08-24 | 张旭杰 | Intelligent detection system and detection method for production processability of briquette |
-
2020
- 2020-05-06 CN CN202010374193.2A patent/CN111337354A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129545A (en) * | 2020-09-23 | 2020-12-25 | 中车长春轨道客车股份有限公司 | Car roof car washing working condition loading universal device for car body static strength test |
| CN113295536A (en) * | 2021-05-21 | 2021-08-24 | 张旭杰 | Intelligent detection system and detection method for production processability of briquette |
| CN113295536B (en) * | 2021-05-21 | 2022-07-22 | 海南联达森贸易有限公司 | Intelligent detection system and detection method for production and processing performance of moulded coal |
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