CN113607560B - Horizontal outer pressure testing device - Google Patents
Horizontal outer pressure testing device Download PDFInfo
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- CN113607560B CN113607560B CN202110851424.9A CN202110851424A CN113607560B CN 113607560 B CN113607560 B CN 113607560B CN 202110851424 A CN202110851424 A CN 202110851424A CN 113607560 B CN113607560 B CN 113607560B
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- flat cover
- supporting plates
- clamp
- supporting plate
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- 238000012360 testing method Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005056 compaction Methods 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 16
- 238000002474 experimental method Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000001687 destabilization Effects 0.000 description 2
- 230000000368 destabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
-
- 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
- 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
- G01N2203/0048—Hydraulic means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a horizontal external compaction test device, which relates to the technical field of pressure equipment tests and comprises a barrel, a saddle, a water filling port, a water discharging port, a loading port, a flange, a flat cover, an experimental sample, a pressure gauge port and an emptying port.
Description
Technical Field
The invention relates to the technical field of pressure equipment tests, in particular to a horizontal external compaction test device.
Background
In the design of pressure vessels, stability is a major design issue for vessels subjected to external pressure, while critical destabilizing pressure is a major basis for judging destabilization. However, the critical destabilizing pressure determined by the design formula is too conservative, resulting in waste of materials in engineering applications. Therefore, in the research of external pressure containers, the critical unsteady pressure of external pressure is often required to be obtained through experiments so as to better analyze the bearing capacity of the container and guide the design of the pressure container. The influence of the axial load on the critical unsteady pressure of the sample is not fully considered by the existing outer pressure test platform, so that the test result is influenced when the test is carried out on the container which only bears uniformly distributed circumferential outer pressure; current outer compaction test platforms do not adequately consider the manner in which different sizes, types of thin shells are secured.
Disclosure of Invention
In view of the problems existing in the prior art, the invention aims to provide the horizontal external pressure testing device which can realize external pressure tests of different types of thin shells by changing the type of the supporting plate and has the characteristics of simplicity in operation and improvement of test efficiency.
The invention provides a horizontal external compaction test device which comprises a barrel, a saddle, a water filling port, a water discharging port, a loading port, a flange, a flat cover, an experimental sample, a pressure gauge port and an emptying port, wherein the barrel is fixed on the saddle, the water filling port, the water discharging port and the loading port are sequentially arranged below the barrel, the pressure gauge port and the emptying port are arranged above the barrel, one end of the barrel is provided with a hole, the flange is welded on the outer side of the hole, the flat cover is arranged on the flange, and the horizontal external compaction test device is characterized in that a clamp mechanism for fixing the experimental sample is arranged in the barrel, the experimental sample is clamped in the barrel through the clamp mechanism, the clamp mechanism is fixed on the flat cover, and the flat cover is connected with the flange through a double-head bolt.
Further, the clamp mechanism is a first clamp, a second clamp or a third clamp for clamping the sealed head type sample, wherein the first clamp and the second clamp are used for clamping the cylindrical shell.
Further, first anchor clamps include a set of first layer board, a set of first sample strengthening ring and a set of first screw rod, both ends are equipped with first layer board respectively in the barrel, and wherein be close to the first layer board of flat cover one end and pass through the bolt fastening with the flat cover, be equipped with first screw rod between two first layer boards, a plurality of first recess has been seted up on the first layer board, be equipped with the sealing washer in the first recess, experimental sample welding is on first sample strengthening ring, first sample strengthening ring sets up in the first recess of the first layer board in both ends, offsets rather than the sealing washer that corresponds.
Further, the upper portion and the lower portion of the first supporting plate are respectively provided with a first screw hole, and the first screw penetrates through the first screw holes to be matched with nuts so as to fix the first supporting plate on the flat cover.
Further, the second fixture comprises a group of second supporting plates, a group of second sample reinforcing rings and a group of second screws, the second supporting plates are respectively arranged at two ends in the cylinder body, each second supporting plate is of a ladder-shaped structure, the ladder-shaped structure is convenient for adjusting the height of an experimental sample, the second supporting plates close to one end of the flat cover are fixed with the flat cover through bolts, the second screws are arranged between the two second supporting plates, a plurality of second grooves are formed in the second supporting plates, sealing rings are arranged in the second grooves, the experimental sample is welded on the second sample reinforcing rings, and the second sample reinforcing rings are arranged in the second grooves of the second supporting plates at two ends and are abutted against the corresponding sealing rings.
Further, the third clamp comprises a third supporting plate and a third screw rod, the third supporting plate is arranged at one end, close to the flat cover, in the cylinder body, the third screw rod is respectively arranged on the upper portion and the lower portion of the third supporting plate, the third supporting plate is connected with the flat cover through a bolt, and the experimental sample is welded on the third supporting plate.
Further, the strain gauge comprises a strain gauge and a computer, wherein the strain gauge is adhered to the inner side of the experimental sample, and the strain gauge is electrically connected with the computer.
Further, an observation port for conveniently observing the change of the sample is formed in the flat cover.
Further, the camera is arranged at the observation port and is electrically connected with the computer.
Further, the device comprises a manhole, the other end of the cylinder body is welded with a sealing head, the sealing head is provided with a manhole, and the manhole is provided with a flange cover.
Compared with the prior art, the invention has the beneficial effects that:
1) By adopting the technical scheme, the influence of uniform external pressure on the critical unsteady pressure of the sample can be researched through the device, and the horizontal external pressure experimental device has the characteristics of being reusable and suitable for external pressure experiments of various pressure containers, and an experimental sample is connected with an experimental device through a corresponding clamp;
2) In the fixture mechanism arranged in the device, different types of experimental samples can be clamped by changing the types of the supporting plates, so that different types of thin shell external pressure experiments are realized;
3) The device adopts liquid for pressurization, so that the safety of experiments is ensured;
4) The device has reasonable structural design and high safety, and greatly improves the experimental efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic left-hand structural view of the overall structure of the present invention;
FIG. 3 is a schematic view of a first fixture according to the present invention;
FIG. 4 is a schematic view of a second clamp according to the present invention;
fig. 5 is a schematic structural view of a third clamp according to the present invention.
In the figure: 1-a cylinder; 1001-viewing port; 2-manhole; 3-a clamp mechanism; 4-saddle; 5-a water filling port; 6, a water outlet; 7-loading port; 8-flanges; 9-stud bolts; 10-flat cover; 11-an experimental sample; 12-bolts; 13-a pressure gauge port; 14-an air vent; 15-a first pallet; 1501-a first groove; 16-a first specimen reinforcement ring; 17-a first screw; 18-a second pallet; 1801-a second groove; 19-a second sample stiffener ring; 20-a second screw; 21-a third pallet; 23-a third screw; 24-end socket; 25-flange cover.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of protection of the invention is not limited to the described scope.
As shown in fig. 1-5, a horizontal outer pressure experimental device comprises a barrel 1, a saddle 4, a water filling port 5, a water discharging port 6, a loading port 7, a flange 8, a flat cover 10, an experimental sample 11, a pressure gauge port 13 and a vent port 14, wherein the water filling port 5, the water discharging port 6 and the loading port 7 are sequentially arranged below the barrel 1 and are respectively used for filling water, discharging water and pressurizing in the experimental process, the pressure gauge port 13 and the vent port 14 are arranged above the barrel 1, gas is discharged through the vent port 14 in the experimental process, and the pressure gauge port 13 is connected with a pressure gauge and can record pressure change.
According to the horizontal type outer pressure experimental device, one end of the cylinder body 1 is provided with the hole, the outer side of the hole is welded with the flange 8, the flange 8 is provided with the flat cover 10, the flat cover 10 is provided with the observation port 1001 for conveniently observing the change of a sample, the other end of the cylinder body 1 is welded with the sealing head 24, the sealing head 24 is provided with the manhole 2, the manhole 2 is welded on the cylinder body 1 and plays a role of an overhaul experiment platform, the manhole 2 is provided with the flange cover 25, and the flange cover 25 is movably connected with the manhole 2, so that the opening and the closing are convenient.
According to the horizontal external pressure experimental device, the clamp mechanism 3 for fixing the experimental sample 11 is arranged in the cylinder 1, the experimental sample 11 is clamped in the cylinder 1 through the clamp mechanism 3, the clamp mechanism 3 is fixed on the flat cover 10, and the flat cover 10 is connected with the flange 8 through the stud bolts 9.
The clamp mechanism 3 is a first clamp for clamping the cylindrical shell, a second clamp for flexibly adjusting the height of the experimental sample or a third clamp for clamping the seal head type sample.
The first fixture comprises a group of first supporting plates 15, a group of first sample reinforcing rings 16 and a group of first screw rods 17, wherein the first supporting plates 15 are respectively arranged at two ends in the cylinder body 1, the first supporting plates 15 close to one end of the flat cover 10 are fixed with the flat cover 10 through bolts 12, the first screw rods 17 are arranged between the two first supporting plates 15, a plurality of first grooves 1501 are formed in the first supporting plates 15, sealing rings are arranged in the first grooves 1501, the experimental samples 11 are welded on the first sample reinforcing rings 16, the experimental samples 11 can be prevented from directly contacting with the first supporting plates 15 by welding the experimental samples 11 on the first sample reinforcing rings 16, the first supporting plates 15 extend into the first supporting plates 15, all positions of the samples in the length direction are guaranteed to be pressed outwards, unnecessary experimental errors are reduced, and the first sample reinforcing rings 16 are arranged in the first grooves 1501 of the first supporting plates 15 at the two ends and are abutted against the corresponding sealing rings.
Further, the upper and lower parts of the first supporting plate 15 are respectively provided with a first screw hole, and the first screw 17 passes through the first screw hole to be matched with a nut and is fixed on the flat cover with the first supporting plate 15.
The second clamp comprises a group of second supporting plates 18, a group of second sample reinforcing rings 19 and a group of second screws 20, the second supporting plates 18 are respectively arranged at two ends in the cylinder body 1, the second supporting plates 18 are of a ladder-shaped structure, the ladder-shaped structure is convenient for adjusting the height of the test sample 11, the second supporting plates 18 close to one end of the flat cover 10 are fixed with the flat cover 10 through bolts 12, the second screws 20 are arranged between the two second supporting plates 18, a plurality of second grooves 1801 are formed in the second supporting plates 18, sealing rings are arranged in the second grooves 1801, the test sample 11 is welded on the second sample reinforcing rings 19, the test sample 11 can be prevented from being directly contacted with the second supporting plates 18 by welding the test sample 11 on the second sample reinforcing rings 19 and stretches into the second supporting plates 18, all positions of the test sample in the length direction are guaranteed to be pressed outwards, unnecessary test errors are reduced, and the second sample reinforcing rings 19 are arranged in the second grooves 1801 at two ends and are abutted against the corresponding sealing rings.
Further, the upper and lower parts of the second supporting plate 18 are respectively provided with a second screw hole, and the second screw 20 passes through the second screw hole to be matched with a nut and is fixed on the flat cover with the second supporting plate 18.
The third clamp comprises a third supporting plate 21 and a third screw rod 23, wherein the third supporting plate 21 is arranged at one end, close to the flat cover 10, in the cylinder body 1, the third screw rod 23 is respectively arranged on the upper portion and the lower portion of the third supporting plate 21, the third supporting plate 21 is connected with the flat cover 10 through bolts 12, the experimental sample 11 is welded on the third supporting plate 21, third screw rod holes are respectively formed in the upper portion and the lower portion of the third supporting plate 21, and the third screw rod 23 penetrates through the third screw rod holes to be matched with nuts and is fixed on the flat cover with the third supporting plate 21.
The horizontal external pressure experimental device has the characteristics of reusability and suitability for external pressure experiments of various pressure containers. The experimental sample is connected with the experimental device through the corresponding clamp, and the experimental platform is pressurized by adopting liquid for safety.
The invention relates to a horizontal external pressure testing device which comprises a strain gauge and a computer, wherein the strain gauge is adhered to the inner side of an experimental sample 11, and the strain gauge is electrically connected with the computer.
The invention relates to a horizontal external pressure experimental device, which comprises a camera, wherein the camera is arranged at an observation port 1001 and is electrically connected with a computer.
Another object of the present invention is to provide a method for using a horizontal type external pressure testing device, comprising the following steps:
1) Firstly, attaching a strain gauge on the inner side of an experimental sample 11 to be tested, clamping the experimental sample in a cylinder body 1 through a clamp mechanism 3, connecting the strain gauge attached to the experimental sample 11 with a computer through an observation port at a flat cover 10, and recording the stress strain of the experimental sample in the experimental process; in order to facilitate observation of the change of the experimental sample 11, a camera is also arranged at the observation port of the flat cover 10, and the camera is also connected with a computer;
2) Then, installing a pressure gauge on the pressure gauge port 13 of the cylinder body 1, respectively connecting the water filling port 5 and the loading port 7 with a water pump and a booster pump, and debugging each instrument and meter before the experiment begins;
3) Then, starting an experiment, firstly filling water into a container through a water filling port 5, then continuously pressurizing through a loading port 7, observing that a recess starts to appear on an experiment sample 11 through an observation port at a flat cover 10, gradually enlarging the recess along with the increase of pressure, and recording pressure data on a pressure gauge after the recess is observed to be suddenly changed and a sound surge is heard, wherein the pressure is the critical destabilization pressure when the experiment sample 11 is destabilized;
4) The outer pressure test is finished, the data such as internal stress strain of the computer are stored, then the pressure is relieved through the air vent 14, then the liquid in the device is discharged through the air vent 6, finally the experimental sample 11 is disassembled, the clamp and the like are reserved, and the next use is reserved.
The clamping mechanisms in the step 1) are three types, namely a first clamp for clamping the cylindrical shell, a second clamp for flexibly adjusting the height of the experimental sample or a third clamp for clamping the end socket type sample.
Claims (5)
1. The utility model provides a horizontal outer compaction test device, includes barrel (1), saddle (4), water injection mouth (5), water discharge mouth (6), loading mouth (7), flange (8), flat cover (10), experiment sample (11), manometer mouth (13) and blow hole (14), barrel (1) are fixed in on saddle (4), the below of barrel (1) is equipped with water injection mouth (5), water discharge mouth (6) and loading mouth (7) in proper order, and its top is equipped with manometer mouth (13) and blow hole (14), the hole has been seted up to the one end of barrel (1), and the outside welding of this hole has flange (8), be equipped with flat cover (10) on flange (8), characterized in that be equipped with in barrel (1) be used for fixing experiment sample (11) fixture mechanism (3), experiment sample (11) are held in barrel (1) through fixture mechanism (3), fixture mechanism (3) are fixed in flat cover (10), flat cover (10) are connected through stud (9) with flange (8);
the clamp mechanism (3) is a first clamp, a second clamp or a third clamp for clamping the sealed head type sample, wherein the first clamp and the second clamp are used for clamping the cylindrical shell;
the first clamp comprises a group of first supporting plates (15), a group of first sample reinforcing rings (16) and a group of first screws (17), wherein the first supporting plates (15) are respectively arranged at two ends in the cylinder (1), the first supporting plates (15) close to one end of the flat cover (10) are fixed with the flat cover (10) through bolts (12), the first screws (17) are arranged between the two first supporting plates (15), a plurality of first grooves (1501) are formed in the first supporting plates (15), sealing rings are arranged in the first grooves (1501), the test samples (11) are welded on the first sample reinforcing rings (16), and the first sample reinforcing rings (16) are arranged in the first grooves (1501) of the first supporting plates (15) at two ends and are abutted against the corresponding sealing rings;
screw holes are respectively formed in the upper part and the lower part of the first supporting plate (15), and the first screw (17) penetrates through the screw holes to be matched with nuts and is fixed on the flat cover with the first supporting plate (15);
the second clamp comprises a group of second supporting plates (18), a group of second sample reinforcing rings (19) and a group of second screws (20), wherein the second supporting plates (18) are respectively arranged at two ends in the cylinder (1), each second supporting plate (18) is of a ladder-shaped structure, the ladder-shaped structure is convenient for adjusting the height of an experimental sample (11), the second supporting plates (18) close to one end of the flat cover (10) are fixed with the flat cover (10) through bolts (12), a second screw (20) is arranged between the two second supporting plates (18), a plurality of second grooves (1801) are formed in the second supporting plates (18), sealing rings are arranged in the second grooves (1801), the experimental sample (11) are welded on the second sample reinforcing rings (19), and the second sample reinforcing rings (19) are arranged in the second grooves (1801) at the two ends of the second supporting plates (18) and are abutted against the corresponding sealing rings;
the third clamp comprises a third supporting plate (21) and a third screw rod (23), wherein the third supporting plate (21) is arranged at one end, close to the flat cover (10), in the cylinder body (1), the third screw rod (23) is arranged on the upper portion and the lower portion of the third supporting plate (21), the third supporting plate (21) is connected with the flat cover (10) through bolts (12), and the experimental sample (11) is welded on the third supporting plate (21).
2. The horizontal type outer pressure testing device according to claim 1, comprising a strain gauge and a computer, wherein the strain gauge is adhered to the inner side of the test sample (11), and the strain gauge is electrically connected with the computer.
3. The horizontal type outer pressure testing device according to claim 1, wherein an observation port (1001) for conveniently observing the change of the sample is formed on the flat cover (10).
4. A horizontal type outer pressure testing device according to claim 3, comprising a camera, said camera being arranged at the viewing port (1001) and being electrically connected to a computer.
5. The horizontal outer pressure experimental device according to claim 1, comprising a manhole (2), wherein an end socket (24) is welded at the other end of the cylinder (1), the end socket (24) is provided with the manhole (2), and the manhole (2) is provided with a flange cover (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851424.9A CN113607560B (en) | 2021-07-27 | 2021-07-27 | Horizontal outer pressure testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110851424.9A CN113607560B (en) | 2021-07-27 | 2021-07-27 | Horizontal outer pressure testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113607560A CN113607560A (en) | 2021-11-05 |
| CN113607560B true CN113607560B (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110851424.9A Active CN113607560B (en) | 2021-07-27 | 2021-07-27 | Horizontal outer pressure testing device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001074624A (en) * | 1999-09-01 | 2001-03-23 | Nippon Steel Corp | External pressure load-testing device of steel pipe |
| CN201397272Y (en) * | 2009-05-04 | 2010-02-03 | 陕西科技大学 | Thin walled pipe external pressure instability testing unit |
| CN102564859A (en) * | 2011-12-27 | 2012-07-11 | 浙江大学 | Instability test device of external pressure vessel |
| CN104215514A (en) * | 2014-08-14 | 2014-12-17 | 合肥通用机械研究院 | Device for verifying critical load of external pressure spherical container |
| CN108458833A (en) * | 2018-03-23 | 2018-08-28 | 广州特种承压设备检测研究院 | The test method of outside pressure test machine and outside pressure test machine |
| CN208076315U (en) * | 2018-04-19 | 2018-11-09 | 福州大学 | Pulse external pressure buckling test device |
| CN208109594U (en) * | 2017-12-04 | 2018-11-16 | 广州铁诚工程质量检测有限公司 | A kind of tubing proof to external pressure experimental rig |
-
2021
- 2021-07-27 CN CN202110851424.9A patent/CN113607560B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001074624A (en) * | 1999-09-01 | 2001-03-23 | Nippon Steel Corp | External pressure load-testing device of steel pipe |
| CN201397272Y (en) * | 2009-05-04 | 2010-02-03 | 陕西科技大学 | Thin walled pipe external pressure instability testing unit |
| CN102564859A (en) * | 2011-12-27 | 2012-07-11 | 浙江大学 | Instability test device of external pressure vessel |
| CN104215514A (en) * | 2014-08-14 | 2014-12-17 | 合肥通用机械研究院 | Device for verifying critical load of external pressure spherical container |
| CN208109594U (en) * | 2017-12-04 | 2018-11-16 | 广州铁诚工程质量检测有限公司 | A kind of tubing proof to external pressure experimental rig |
| CN108458833A (en) * | 2018-03-23 | 2018-08-28 | 广州特种承压设备检测研究院 | The test method of outside pressure test machine and outside pressure test machine |
| CN208076315U (en) * | 2018-04-19 | 2018-11-09 | 福州大学 | Pulse external pressure buckling test device |
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| Publication number | Publication date |
|---|---|
| CN113607560A (en) | 2021-11-05 |
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