CN108931446B - Engineering plastic sleeve impact detection device and detection method - Google Patents
Engineering plastic sleeve impact detection device and detection method Download PDFInfo
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- CN108931446B CN108931446B CN201810515846.7A CN201810515846A CN108931446B CN 108931446 B CN108931446 B CN 108931446B CN 201810515846 A CN201810515846 A CN 201810515846A CN 108931446 B CN108931446 B CN 108931446B
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-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
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
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Abstract
The invention discloses an engineering plastic sleeve impact detection device and a detection method, and relates to the technical field of detection. The device has the advantages that the inclination angle of the lifting plate can be adjusted through rotating the rocker arm, so that the inclination angle of the engineering plastic sleeve to be tested is adjusted, and the purpose of testing engineering plastic sleeves with different specifications by using one set of device is achieved. The detection method removes the fixation of the pipe part of the engineering plastic sleeve and the bearing of the non-tested flange in the original ETAG test, and the tested state of the tested engineering plastic sleeve is closer to the actual use working condition.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an engineering plastic sleeve impact detection device and a detection method.
Background
The performance test of the engineering plastic sleeve mainly follows the method described in European industry standard ETAG-006 and focuses on tensile strength test and flange 45-degree impact test since the engineering plastic sleeve is introduced into the domestic single-layer coiled material roof system. However, with the gradual occurrence of sleeve brittle fracture failure cases in engineering practice and the characteristic that part of failed sleeves can basically pass through the ETAG test but can break when being kicked manually, we begin to discuss a test method and a test machine tool which are developed on the basis of the ETAG impact test and can detect the difference, so that a large number of engineering users can effectively screen the application performance of materials, and the sleeve with insufficient strength is prevented from entering a single-layer roof system to cause long-term potential safety hazards.
The flange 45-degree impact test of the original ETAG mainly uses a 2KG heavy hammer which is never less than 1000mm in height, fixes a sleeve pipe part and carries out 45-degree impact on a tested flange under the condition of bearing the non-tested flange. From the analysis of stress, the test is used for simply investigating the toughness and the impact resistance of the flange. Because most of the sleeves are fixed and supported, the weak parts except the flange parts are difficult to be inspected in the test. In the case of actual failure, the brittle fracture of the portion other than the flange accounts for a considerable proportion.
The end face of the coil fixing sleeve is generally approximately rectangular, and the original ETAG impact test is specific to the short side (namely, the longer flange) of the coil fixing sleeve; under the actual use condition of the sleeve, the load on the long edge (namely the shorter flange) of the end face is at least several times that on the short edge, because the long edge of the sleeve end face is generally arranged along the edge of the coiled material in an approximately rectangular shape in the actual use, namely the long edge is generally exposed to the wind uncovering load transmitted by the large-area coiled material between row spacings, and the short edge corresponds to the wind uncovering load transmitted by the small-area coiled material between plant spacings. The impact test point of the original ETAG is not a weak point of the sleeve in actual use. This explains in part why some sleeves still cause extensive failure of the roof in the event of substantial ETAG impact.
In summary, the original ETAG test has a blind spot due to lack of integrity, and indeed, effective investigation according to the load level of the sleeve in the real environment cannot be made.
Disclosure of Invention
The invention aims to solve the technical problems and provides an engineering plastic sleeve impact detection device and a detection method, which can simulate a real environment to effectively investigate the load level of the engineering plastic sleeve in the fixing application of the waterproof roll.
In order to achieve the purpose, the invention adopts the following technical scheme: engineering plastic sleeve impact detection device, including board and
one end of the lifting plate is hinged with one end of the machine table, and the upper surface of the other end of the lifting plate is provided with a groove;
the first screw rod vertically penetrates through the other end of the machine table, and the upper end of the first screw rod is hinged with the other end of the lifting plate;
the second screw rod is vertical to the first screw rod;
the crank is fixedly connected with the second screw rod;
the spiral screw rod mechanism is arranged between the first screw rod and the second screw rod and can convert the rotation of the crank into the lifting motion of the first screw rod;
and the impact hammer is arranged right above the groove. The inclination angle of the lifting plate can be adjusted through rotating the rocker arm, so that the inclination angle of the engineering plastic sleeve to be tested is adjusted, and the purpose of testing the engineering plastic sleeves of different specifications by using one set of device is achieved.
Preferably, a sleeve is fixedly arranged on the machine table, an internal thread matched with the first screw rod is arranged on the sleeve, and the first screw rod penetrates through the sleeve. The vertical direction of the first screw rod is ensured, and the impact bearing capacity of the first screw rod is enhanced.
Preferably, the other end of the lifting plate is provided with a cavity, and the upper surface of the cavity is provided with a groove for communicating the cavity with the external space. Therefore, the non-tested flange is in a suspended state, and the tested state of the tested engineering plastic sleeve is closer to the actual use working condition.
An impact detection method for an engineering plastic sleeve, which is characterized in that the impact detection device for the engineering plastic sleeve according to claim 1 or 2 is adopted, and the method comprises the following steps:
step a, placing a flange of the engineering plastic sleeve to be tested into the groove;
b, rotating the crank, and adjusting the central line of the engineering plastic sleeve to be tested to a preset test angle with the horizontal plane;
and c, releasing the impact hammer to enable the impact hammer to freely fall to impact the flange of the engineering plastic sleeve to be tested. The fixing of the sleeve part and the bearing of the non-tested flange in the original ETAG test are removed, and the tested state of the engineering plastic sleeve to be tested is closer to the actual use working condition.
Preferably, the predetermined angle of the test is 45 degrees.
Preferably, the mass of the impact hammer is 2 kilograms.
Further, the distance between the impact hammer and the flange of the engineering plastic sleeve to be tested is 1.2-1.5 m.
The device has the advantages that the inclination angle of the lifting plate can be adjusted through rotating the rocker arm, so that the inclination angle of the engineering plastic sleeve to be tested is adjusted, and the purpose of testing engineering plastic sleeves with different specifications by using one set of device is achieved. The detection method removes the fixation of the pipe part of the engineering plastic sleeve and the bearing of the non-tested flange in the original ETAG test, and the tested state of the tested engineering plastic sleeve is closer to the actual use working condition.
Drawings
FIG. 1 is a schematic structural diagram of an engineering plastic sleeve impact detection device according to the present invention;
wherein, 1-machine table; 2-lifting plate; 21-a first hinge; 22-a second hinge; 23-a groove; 24-a cavity; 3-a screw rod mechanism; 4-a crank; 5-a first screw rod; 6-a sleeve; 7-a second screw rod; 8-engineering plastic sleeve to be tested; 81-flange; 82-a barrel portion; 9-an impact assembly; 91-lifting a rope; 92-impact hammer; 93-guide tube.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, an engineering plastic sleeve impact detection device comprises a machine table 1 and a lifting plate 2, wherein one end of the lifting plate 1 is hinged with one end of the machine table through a first hinge 21, the other end of the lifting plate 2 is provided with a cavity 24, the upper surface of the cavity 24 is provided with a groove 23, and the cavity 24 is communicated with an external space; the first screw rod 5 vertically penetrates through the other end of the machine table, and the upper end of the first screw rod 5 is hinged with the other end of the lifting plate 2 through a second hinge 22; the second screw rod 7 is vertical to the first screw rod 5; the crank 4 is fixedly connected with the second screw rod 7; the screw rod mechanism 3 is arranged between the first screw rod 5 and the second screw rod 7 and can convert the rotation of the crank 4 into the lifting motion of the first screw rod 5; the impact assembly 9 comprises a lifting rope 91, an impact hammer 92 and a guide pipe 93, and is arranged right above the groove 23. A sleeve 6 is fixedly arranged on the machine table 1, the sleeve 6 is provided with an internal thread matched with the first screw rod 7, and the first screw rod 7 penetrates through the sleeve 6. Wherein the impact hammer 92 is a metal cylinder with a diameter of 40mm and a mass of 2kg, and the guide tube 93 is a metal tube with a diameter of 50 mm. The lower end face of the impact hammer 92 is not less than 1 meter away from the flange 81 of the engineering plastic sleeve 8 to be tested.
The impact detection method for the engineering plastic sleeve adopts the impact detection device for the engineering plastic sleeve, and comprises the following steps:
step a, placing a flange 81 of the engineering plastic sleeve 8 to be tested into the groove 23;
step b, rotating the crank 4 to adjust the central line of the barrel part 82 to form an angle of 45 degrees with the horizontal plane;
and step c, releasing the impact hammer 92 to enable the impact hammer to freely fall to impact the flange 81 of the plastic sleeve 8 of the engineering to be tested.
The test method is characterized in that engineering plastic sleeves of a certain manufacturer are used as samples, 10 engineering plastic sleeves are used as a group to be impacted, and the initial results are as follows:
the application selects the engineering plastic sleeve to be the brand which does not have any accident in the domestic engineering, so the application takes the test condition of the next level of the maximum tolerance as the qualified screening criterion of the impact resistance of the engineering plastic sleeve, namely: weight of 2KG, height of 1.5 m.
Although the specific embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto, and some technical contents known to those skilled in the art will be omitted herein for brevity.
Claims (7)
1. An engineering plastic sleeve impact detection device is characterized by comprising a machine table and
one end of the lifting plate is hinged with one end of the machine table, and the upper surface of the other end of the lifting plate is provided with a groove;
the first screw rod vertically penetrates through the other end of the machine table, and the upper end of the first screw rod is hinged with the other end of the lifting plate;
the second screw rod is vertical to the first screw rod;
the crank is fixedly connected with the second screw rod;
the spiral screw rod mechanism is arranged between the first screw rod and the second screw rod and can convert the rotation of the crank into the lifting motion of the first screw rod;
and the impact hammer is arranged right above the groove.
2. The engineering plastic sleeve impact detection device according to claim 1, wherein a sleeve is fixedly arranged on the machine table, the sleeve is provided with an internal thread matched with the first screw rod, and the first screw rod penetrates through the sleeve.
3. The engineering plastic sleeve impact detection device according to claim 1, wherein a cavity is formed in the other end of the lifting plate, a groove is formed in the upper surface of the cavity, and the cavity is communicated with an external space.
4. An impact detection method for an engineering plastic sleeve, which is characterized in that the impact detection device for the engineering plastic sleeve according to claim 1 is adopted, and the method comprises the following steps:
step a, placing a flange of the engineering plastic sleeve to be tested into the groove;
b, rotating the crank, and adjusting the central line of the engineering plastic sleeve to be tested to a preset test angle with the horizontal plane;
and c, releasing the impact hammer to enable the impact hammer to freely fall to impact the flange of the engineering plastic sleeve to be tested.
5. The method for testing impact of engineering plastic sleeve according to claim 4, wherein the predetermined angle is 45 degrees.
6. The method for detecting the impact of the engineering plastic sleeve according to claim 4, wherein the mass of the impact hammer is 2 kg.
7. The engineering plastic sleeve impact detection method as claimed in claim 6, wherein the distance between the impact hammer and the flange of the engineering plastic sleeve to be tested is 1.2-1.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810515846.7A CN108931446B (en) | 2018-05-25 | 2018-05-25 | Engineering plastic sleeve impact detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810515846.7A CN108931446B (en) | 2018-05-25 | 2018-05-25 | Engineering plastic sleeve impact detection device and detection method |
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| Publication Number | Publication Date |
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| CN108931446A CN108931446A (en) | 2018-12-04 |
| CN108931446B true CN108931446B (en) | 2020-11-27 |
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| CN201810515846.7A Active CN108931446B (en) | 2018-05-25 | 2018-05-25 | Engineering plastic sleeve impact detection device and detection method |
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| CN115363321B (en) * | 2022-01-24 | 2024-01-12 | 温州医科大学 | Damping evaluation device and method for sports shoes |
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| CN201203513Y (en) * | 2008-04-28 | 2009-03-04 | 浙江竞远机械设备有限公司 | Rim falling weight impact test machine |
| CN202453256U (en) * | 2011-12-14 | 2012-09-26 | 北汽福田汽车股份有限公司 | Falling-ball impact testing device |
| CN107796716B (en) * | 2017-11-28 | 2024-02-13 | 河北视窗玻璃有限公司 | Impact test device |
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Address after: 262700 Shandong city in Weifang Province, Shouguang City, Taiwan town government West 2000 meters Applicant after: HONGYUAN WATERPROOF TECHNOLOGY GROUP Co.,Ltd. Address before: 262700 Shandong city in Weifang Province, Shouguang City, Taiwan town government West 2000 meters Applicant before: WEIFANG HONGYUAN WATERPROOF MATERIAL Co.,Ltd. |
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