CN114034444A - Metal corrugated pipe bending tester and testing method thereof - Google Patents
Metal corrugated pipe bending tester and testing method thereof Download PDFInfo
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- CN114034444A CN114034444A CN202111432673.0A CN202111432673A CN114034444A CN 114034444 A CN114034444 A CN 114034444A CN 202111432673 A CN202111432673 A CN 202111432673A CN 114034444 A CN114034444 A CN 114034444A
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- corrugated pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/142—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for tubes
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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
- G01N3/02—Details
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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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
- G01N2203/0023—Bending
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
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- 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 metal corrugated pipe bending tester and a testing method thereof. The invention adopts the square frame column, and the arc-shaped grooves with a plurality of specifications are arranged on each column surface, so that the bending of metal corrugated pipes with different specifications can be adapted, the bending efficiency is improved, the equipment cost is reduced, the vertical structure is convenient for manual bending, and when the length of the metal corrugated pipe reaches 1.5m, the lower end of the metal corrugated pipe is clamped into the groove to serve as a supporting point, the upper side of the metal corrugated pipe is slowly pressed and bent and is gradually pressed into the arc-shaped groove, compared with horizontal bending, the operation is more convenient, the clamping is more time-saving and labor-saving, the local damage of the metal corrugated pipe (formed by spirally winding an iron sheet and easy to generate gap water leakage between the wound inner layer and the wound outer layer) is avoided, and the measurement stability is improved.
Description
Technical Field
The invention relates to a metal corrugated pipe bending tester and a test method thereof, belonging to the technical field of metal corrugated pipe bending equipment.
Background
The metal corrugated pipe for prestressed concrete is required to be bent, a lower end plugging water or cement slurry is taken down after bending, the water seepage condition on the surface of the metal corrugated pipe is observed, and most of the existing metal corrugated pipes in the bending process adopt a single groove to correspond to a diameter model, so that the models are multiple and the transportation is inconvenient.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the bending tester for the metal corrugated pipe and the testing method thereof are provided to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a metal bellows bending test appearance, includes square frame post, and every side of square frame post is provided with many arc grooves of equidimension not.
Preferably, the arc-shaped groove on each side is embedded into the surface of the square frame column, and the depth of the arc-shaped groove is greater than one half of the nominal outer diameter of the corresponding metal corrugated pipe.
Preferably, the bottom of the arc-shaped groove penetrates through the through hole of the square frame column to form a limiting hole.
Preferably, the bottom of the square frame column is provided with a universal wheel with a brake mechanism.
Preferably, the curvature radius P of each arc-shaped groove is larger than the bending radius R of the metal corrugated pipe, R =30 × R, R represents the nominal inner diameter of the metal corrugated pipe, and the curvature radius P ensures that the bending radius R is within an error range after the metal corrugated pipe is removed.
Preferably, above-mentioned metal bellows bending test appearance still includes pushing mechanism, and pushing mechanism includes briquetting and screw rod, and briquetting one side sets up convex recess, back swivelling joint screw rod one end, screw rod screwed connection on the fixing base and the screw rod level towards the crooked direction of arc recess, and fixing base fixed connection is on square frame post surface.
Preferably, the pushing mechanism is provided with two sets, one set is arranged in the middle of the square frame column, and the other set is arranged close to the top of the square frame column.
Preferably, the method for testing the metal corrugated pipe bending tester comprises the following steps:
(1) preparing a metal corrugated pipe test piece: processing the sample into a test piece with the length of 1500 mm;
(2) selecting a radian groove which meets the required curvature radius according to the diameter of the metal corrugated pipe test piece, wherein the curvature radius R of the round pipe is 30 times of the nominal inner diameter of the round pipe, and the curvature radius R of the flat pipe in the short axis direction is 4000 mm;
(3) placing the metal corrugated pipe test piece in a groove of a radian groove corresponding to a square frame column of a bending tester: firstly, clamping the lower end of a metal corrugated pipe test piece into a limiting hole, gradually pressing the metal corrugated pipe test piece to bend and push the metal corrugated pipe test piece into an arc-shaped groove, when two sets of pushing mechanisms are pushed into a set position according to the pipe diameter larger than a set value, clamping the metal corrugated pipe test piece into the groove of a pressing block, firstly adjusting the lower screw driving pressing block to move for a set distance, then adjusting the upper screw driving pressing block to move for a set distance, and adjusting the lower pressing block and the upper pressing block back and forth until the metal corrugated pipe test piece reaches the arc-shaped groove and is pushed into the arc-shaped groove;
(4) taking down a metal corrugated pipe test piece after bending for a set time, plugging the bottom of the metal corrugated pipe test piece into an arc shape by using a conical plug with a silica gel sleeve, and placing the metal corrugated pipe test piece on a placing frame;
(5) filling the prepared ordinary silicate cement slurry into a metal corrugated pipe test piece, observing the surface leakage condition for 30min, or filling the test piece with clear water, and if the test piece does not have water seepage, not using the cement slurry for testing; wherein the ordinary silicate cement slurry is the ordinary silicate cement slurry with the water cement ratio of 0.50;
(6) and taking down the test piece after the test is finished.
Preferably, the placing frame comprises a bottom plate and a door-shaped frame, the door-shaped frame is fixedly connected to the bottom plate, a circular groove with the diameter larger than the outer diameter of the placing metal corrugated pipe is formed in the bottom plate, and an omega-shaped elastic clamp is arranged on a cross beam of the door-shaped frame and above the circular groove.
Preferably, a spray head which is over against the upper part of the omega-shaped elastic clamp is further arranged on the beam of the door-shaped frame, and the spray head is connected to the water tank or the cement slurry tank through a pump.
The invention has the beneficial effects that: compared with the prior art, the invention adopts the square frame column, the arc-shaped grooves with a plurality of specifications are arranged on each column surface, the bending of metal corrugated pipes with different specifications can be adapted, the bending efficiency is improved, the equipment cost is reduced, the vertical structure is convenient for manual bending, when the length of the metal corrugated pipe reaches 1.5m, the lower end is clamped into the groove to play a supporting point, the upper side is slowly pressed to bend and is gradually pressed into the arc-shaped groove, the operation is more convenient compared with horizontal bending, the clamping is more time-saving and labor-saving, the local damage of the metal corrugated pipe (formed by spirally winding an iron sheet and easy to generate gap water leakage between the wound inner layer and the wound outer layer) is avoided, and the measurement stability is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic view of a compact structure;
FIG. 4 is a schematic diagram of a top view of a compact;
FIG. 5 is a schematic view of a placement frame;
FIG. 6 is a schematic top view of the omega-shaped elastic card;
fig. 7 is a schematic view of a conical plug construction.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1-7, a metal corrugated pipe bending tester, including square frame post 1, 1 every side of square frame post is provided with many arc grooves 2 of equidimension not, and many arc grooves are provided with 20 specifications, tests to the corrugated metal pipe diameter commonly used, still is provided with completely to flat pipe, and when flat pipe was crooked, the radius of curvature radius of flat pipe was guaranteed to the radius of arc groove is 4000 mm.
Preferably, the arc-shaped groove 2 on each side is embedded into the surface of the square frame column 1, the depth of the arc-shaped groove is larger than one half of the nominal outer diameter of the corresponding metal corrugated pipe, the metal corrugated pipe is prevented from popping out of the arc-shaped groove under the elastic action, and the metal corrugated pipe is ensured to be clamped into the arc-shaped groove more stably and reliably in the bending process.
Preferably, the through-hole that square frame post 1 was worn out to above-mentioned 2 bottoms of arc recess constitutes spacing holes, during the use with the spacing hole of corrugated metal pipe embedding, plays the effect of strong point, progressively presses corrugated metal pipe and progressively blocks in the arc recess, imbeds labour saving and time saving more, especially to the corrugated metal pipe of great pipe diameter.
Preferably, the universal wheel 3 with the brake mechanism is installed at the bottom of the square frame column 1, so that the equipment can be conveniently moved and carried, and the lifting lug is installed at the top of the square frame column 1, so that the lifting is convenient.
Preferably, the curvature radius P of each arc-shaped groove 2 is greater than the bending radius R of the metal corrugated pipe, R =30 × R, R represents the nominal inner diameter of the metal corrugated pipe, the curvature radius P ensures that the bending radius R can be within an error range after the metal corrugated pipe is removed, a bending structure with the complete radius R can be kept as far as possible after the metal corrugated pipe is bent, and the test accuracy is improved after water or cement slurry is added.
Preferably, the metal corrugated pipe bending tester also comprises a pushing mechanism arranged on the cylindrical surface of the arc-shaped groove with the larger pipe diameter, the pushing mechanism comprises a pressing block 4 and a screw rod 5, one side of the pressing block 4 is provided with an arc-shaped groove 6, the back surface of the pressing block is rotatably connected with one end of the screw rod 5, the screw rod 5 is spirally connected on a fixed seat 7, the screw rod 5 horizontally faces the bending direction of the arc-shaped groove 2, the fixed seat 7 is fixedly connected on the surface of the square frame column 1, when in use, the lower end of the metal corrugated pipe is clamped into a limiting hole, the pushing mechanism is used for pushing the metal corrugated pipe to the arc-shaped groove, manual beating or pressing is adopted for the metal corrugated pipe with the pipe diameter of more than 60mm, time and labor are saved, an elastic rubber layer is arranged in the groove 6 to avoid damaging the metal corrugated pipe, the outer end of the screw rod is provided with a head, the head is provided with a through hole, and the through hole is convenient for inserting a rod piece to rotate, the rotation saves time and labor.
Preferably, above-mentioned pushing mechanism adopts two sets, one set sets up at 1 middle part of square frame post, another set sets up near 1 top of square frame post, to the corrugated metal pipe of pipe diameter more than 60mm, the manual work is pressed the bending, waste time and energy, adopt two sets to arrange from top to bottom, cooperation bottom corrugated metal pipe test piece is blocked spacing hole, can improve bending stability and reliability, and test accuracy nature, avoid local stress concentration to lead to local deformation, take place the inside space that produces of bellows after the deformation easily and leak, make the test result inaccurate.
Preferably, the method for testing the metal corrugated pipe bending tester comprises the following steps:
(1) preparing a metal corrugated pipe test piece: processing the sample into a test piece with the length of 1500 mm;
(2) selecting a radian groove which meets the required curvature radius according to the diameter of the metal corrugated pipe test piece, wherein the curvature radius R of the round pipe is 30 times of the nominal inner diameter of the round pipe, and the curvature radius R of the flat pipe in the short axis direction is 4000 mm;
(3) placing the metal corrugated pipe test piece in a groove of a radian groove corresponding to a square frame column of a bending tester: firstly, clamping the lower end of a metal corrugated pipe test piece into a limiting hole, gradually pressing the metal corrugated pipe test piece to bend and push the metal corrugated pipe test piece into an arc-shaped groove, when two sets of pushing mechanisms are pushed into a set position according to the pipe diameter larger than a set value, clamping the metal corrugated pipe test piece into the groove of a pressing block, firstly adjusting the lower screw driving pressing block to move for a set distance, then adjusting the upper screw driving pressing block to move for a set distance, and adjusting the lower pressing block and the upper pressing block back and forth until the metal corrugated pipe test piece reaches the arc-shaped groove and is pushed into the arc-shaped groove; the pressing-in method can avoid local deformation caused by local stress concentration, and void water leakage is easily generated in the corrugated pipe after deformation, so that the test result is not accurate;
(4) taking down a metal corrugated pipe test piece after bending for a set time, plugging the bottom of the metal corrugated pipe test piece into an arc shape by using a conical plug with a silica gel sleeve, and placing the metal corrugated pipe test piece on a placing frame;
(5) filling the prepared ordinary silicate cement slurry into a metal corrugated pipe test piece, observing the surface leakage condition for 30min, or filling the test piece with clear water, and if the test piece does not have water seepage, not using the cement slurry for testing; wherein the ordinary silicate cement slurry is the ordinary silicate cement slurry with the water cement ratio of 0.50;
(6) and taking down the test piece after the test is finished.
Preferably, above-mentioned toper stopper 14 includes the awl post 15 of the integrative structure of multistage, every section awl post 15 is provided with annular step 16, detachably is connected with silica gel cover 17 on every section awl post 15, toper stopper 14 bottom is provided with baffle 18, annular step on the one hand, can improve the frictional force with silica gel cover, on the other hand, increase effective area of contact, the chucking shutoff is more reliable, silica gel cover 17 adopts different specifications, can adapt to the shutoff of the corrugated metal pipe in the certain pipe diameter within range, reduce the cost of manufacture of end cap, it is better also to be convenient for improve the shutoff leakproofness.
Preferably, the placing frame comprises a bottom plate 8 and a door-shaped frame 9, the door-shaped frame 9 is fixedly connected to the bottom plate 8, a circular groove 10 with a diameter larger than the outer diameter of a placed metal corrugated pipe is formed in the bottom plate 8, an omega-shaped elastic clamp 11 is arranged above the circular groove 10 on a cross beam of the door-shaped frame 9, the placing is stable and reliable, the water seepage situation is convenient to observe, a plurality of pairs of circular grooves 10 and omega-shaped elastic clamps 11 are arranged on the door-shaped frame 19, and a bent metal corrugated pipe test piece can be placed at the same time.
Preferably, the cross beam of the door-shaped frame 9 is further provided with a nozzle 12 facing the upper part of the omega-shaped elastic clamp 11, the nozzle 12 is connected to the water tank or the cement slurry tank through a pump, so that water or cement slurry can be automatically added, the situation that a metal corrugated pipe test piece is too high and is difficult to add water or cement slurry is avoided, the adding efficiency is improved, and the labor intensity is reduced.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (10)
1. The utility model provides a metal bellows bending test appearance which characterized in that: the square frame column comprises a square frame column (1), wherein a plurality of arc-shaped grooves (2) with different sizes are formed in each side surface of the square frame column (1).
2. The metal bellows bending tester according to claim 1, wherein: the arc-shaped groove (2) on each side is embedded into the surface of the square frame column (1), and the depth of the arc-shaped groove is larger than one half of the nominal outer diameter of the corresponding metal corrugated pipe.
3. The metal bellows bending tester according to claim 1, wherein: the bottom of the arc-shaped groove (2) penetrates through the through hole of the square frame column (1) to form a limiting hole.
4. The metal bellows bending tester according to claim 1, wherein: the bottom of the square frame column (1) is provided with a universal wheel (3) with a brake mechanism.
5. The metal bellows bending tester according to claim 1, wherein: the curvature radius P of each arc-shaped groove (2) is larger than the bending radius R of the metal corrugated pipe, R = 30R, R represents the nominal inner diameter of the metal corrugated pipe, and the curvature radius P ensures that the bending radius R can be within an error range after the metal corrugated pipe is removed.
6. The metal bellows bending tester according to claim 1, wherein: still include pushing mechanism, pushing mechanism includes briquetting (4) and screw rod (5), and briquetting (4) one side sets up convex recess (6), back swivelling joint screw rod (5) one end, screw rod (5) screwed connection on fixing base (7) and screw rod (5) level towards arc recess (2) crooked direction, and fixing base (7) fixed connection is on square frame post (1) surface.
7. The metal bellows bending tester according to claim 6, wherein: two sets of pushing mechanisms are adopted, one set is arranged in the middle of the square frame column (1), and the other set is arranged close to the top of the square frame column (1).
8. The test method of the metal bellows bending tester according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
(1) preparing a metal corrugated pipe test piece: processing the sample into a test piece with the length of 1500 mm;
(2) selecting a radian groove which meets the required curvature radius according to the diameter of the metal corrugated pipe test piece, wherein the curvature radius R of the round pipe is 30 times of the nominal inner diameter of the round pipe, and the curvature radius R of the flat pipe in the short axis direction is 4000 mm;
(3) placing the metal corrugated pipe test piece in a groove of a radian groove corresponding to a square frame column of a bending tester: firstly, clamping the lower end of a metal corrugated pipe test piece into a limiting hole, gradually pressing the metal corrugated pipe test piece to bend and push the metal corrugated pipe test piece into an arc-shaped groove, when two sets of pushing mechanisms are pushed into a set position according to the pipe diameter larger than a set value, clamping the metal corrugated pipe test piece into the groove of a pressing block, firstly adjusting the lower screw driving pressing block to move for a set distance, then adjusting the upper screw driving pressing block to move for a set distance, and adjusting the lower pressing block and the upper pressing block back and forth until the metal corrugated pipe test piece reaches the arc-shaped groove and is pushed into the arc-shaped groove;
(4) taking down a metal corrugated pipe test piece after bending for a set time, plugging the bottom of the metal corrugated pipe test piece into an arc shape by using a conical plug with a silica gel sleeve, and placing the metal corrugated pipe test piece on a placing frame;
(5) filling the prepared ordinary silicate cement slurry into a metal corrugated pipe test piece, observing the surface leakage condition for 30min, or filling the test piece with clear water, and if the test piece does not have water seepage, not using the cement slurry for testing; wherein the ordinary silicate cement slurry is the ordinary silicate cement slurry with the water cement ratio of 0.50;
(6) and taking down the test piece after the test is finished.
9. The test method of the metal bellows bending tester according to claim 8, characterized in that: the placing frame comprises a bottom plate (8) and a door-shaped frame (9), the door-shaped frame (9) is fixedly connected onto the bottom plate (8), a circular groove (10) with the diameter larger than the outer diameter of the placing metal corrugated pipe is formed in the bottom plate (8), and an omega-shaped elastic clamp (11) is arranged on a cross beam of the door-shaped frame (9) and above the circular groove (10).
10. The test method of the metal bellows bending tester according to claim 9, characterized in that: a spray head (12) which is over against the upper part of the omega-shaped elastic clamp (11) is also arranged on the beam of the door-shaped frame (9), and the spray head (12) is connected to a water tank or a cement slurry tank through a pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111432673.0A CN114034444A (en) | 2021-11-29 | 2021-11-29 | Metal corrugated pipe bending tester and testing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111432673.0A CN114034444A (en) | 2021-11-29 | 2021-11-29 | Metal corrugated pipe bending tester and testing method thereof |
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| CN202111432673.0A Pending CN114034444A (en) | 2021-11-29 | 2021-11-29 | Metal corrugated pipe bending tester and testing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295493A (en) * | 2022-03-03 | 2022-04-08 | 江苏润硕管业有限公司 | Metal corrugated hose production and manufacturing batch detection test device |
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| JPH1019714A (en) * | 1996-07-08 | 1998-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Device for testing local leakage for bellows of vent tube of reactor container |
| CN111044387A (en) * | 2020-02-26 | 2020-04-21 | 中铁十七局集团第一工程有限公司 | Vertical metal corrugated pipe bending test device |
| CN210487178U (en) * | 2019-10-25 | 2020-05-08 | 四川振通公路工程检测咨询有限公司 | Anti-leakage performance tester for bent metal corrugated pipe |
| CN212275157U (en) * | 2020-05-07 | 2021-01-01 | 广信检测认证集团有限公司 | Metal corrugated pipe bending instrument |
| CN214174097U (en) * | 2021-01-15 | 2021-09-10 | 甘肃路桥建设集团有限公司 | Bending leakage-resistant test device for prestressed metal corrugated pipe |
| CN214310060U (en) * | 2021-01-18 | 2021-09-28 | 葛洲坝集团试验检测有限公司 | Test device for measuring anti-leakage performance of bent metal corrugated pipe |
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2021
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| JPH1019714A (en) * | 1996-07-08 | 1998-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Device for testing local leakage for bellows of vent tube of reactor container |
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| CN111044387A (en) * | 2020-02-26 | 2020-04-21 | 中铁十七局集团第一工程有限公司 | Vertical metal corrugated pipe bending test device |
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| CN214174097U (en) * | 2021-01-15 | 2021-09-10 | 甘肃路桥建设集团有限公司 | Bending leakage-resistant test device for prestressed metal corrugated pipe |
| CN214310060U (en) * | 2021-01-18 | 2021-09-28 | 葛洲坝集团试验检测有限公司 | Test device for measuring anti-leakage performance of bent metal corrugated pipe |
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| Title |
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| 左维诚等: "金属波纹管弯曲后抗渗漏性能试验装置的研究", 《现代测量与实验室管理》, no. 1, pages 21 - 22 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295493A (en) * | 2022-03-03 | 2022-04-08 | 江苏润硕管业有限公司 | Metal corrugated hose production and manufacturing batch detection test device |
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