A pulling-out test device and using method for a curled-edge type of upright locking joint support

Abstract

The present invention is applicable to the technical field of pull-out test, and provides a pull-out test device for a crimped upright lock seam support. The device includes: a clamping member, one side of the clamping member is connected to the chuck of a tensile testing machine; a connecting member, connected to the other side of the clamping member; a pull rod, the pull rod passes through the clamping member and is located inside the connecting member, the upper hooked part of the test piece is buckled on the pull rod, and the lower part of the test piece is connected to another chuck of the tensile testing machine. The present invention also provides a method for using the pull-out test device for a crimped upright lock seam support. The present invention can fill the blank that the existing pull-out test cannot perform strength testing on the crimped upright lock seam support, can be applicable to crimped upright lock seam supports of various sizes, the whole set of test devices can be used on testing machines of different tonnages, without replacing the hydraulic chuck of the testing machine, can quickly conduct the test, is simple to operate and convenient to use.

Description

Technical Field

[0001] The present invention belongs to the technical field of pull-out tests, and particularly relates to a crimped upright locking joint support pull-out test device and a usage method thereof. Background Art

[0002] The metal roof system refers to a roof system that uses metal sheets as roof covering materials, combines the waterproof layer and the structural layer into one, and consists of metal panels, waterproof layers, insulation layers, vapor barriers, sound-absorbing layers, profiled bottom plates, and primary and secondary purlins. The standing seam metal roof system is a typical metal roof structure form, and its connection form is that the vertical edges of adjacent roof panels are occluded to form a tight connection. One end of the support is sleeved in the occluding seam, and the other end is fixed on the purlin. In addition to the advantages of traditional metal roof systems, it also has great advantages in terms of waterproof durability, cost, energy conservation and environmental protection, and thus has gradually become the mainstream choice in metal roof systems.

[0003] Currently, there are two relatively common connection forms for standing seam metal roof panels (as shown in Figure 1 ): support occluding connection and crimped locking connection. Since the crimped locking connection form has a larger occluding area, stronger occluding ability, and better waterproof performance, it is applied more and more in engineering practice. However, the research on the actual force mechanism of the support under this connection form is relatively vague at present, and there is no systematic theoretical result yet, and it is impossible to roughly estimate its bearing capacity through theory. The existing pull-out tests for various specimens generally use a universal testing machine, but the existing universal testing machine does not have a test device suitable for crimped upright locking joint supports, resulting in the inability to conduct the test. Moreover, the pull-out parts for other types of supports in the existing metal roof tensile pull-out tests are not universal, and different pull-out parts need to be used for supports of different sizes, with a high cost, and it is impossible to measure the actual bearing capacity of crimped upright locking joint supports. It can only be tested through the overall wind uplift test, but the overall wind uplift test is too costly and has a huge workload, and is not suitable for repeated tests. Therefore, it is particularly important to provide a direct test method for the actual bearing capacity of crimped upright locking joint supports. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a crimped upright locking joint support pull-out test device, aiming to solve the problems proposed in the above background art.

[0005] The embodiments of the present invention are implemented as follows. A crimped upright locking joint support pull-out test device, the device includes:

[0006] A clamping member, one side of the clamping member is connected to the chuck of a tensile testing machine;

[0007] A connecting member, connected to the other side of the clamping member;

[0008] A pull rod passes through the clamping member and is located inside the connecting member. The upper hook of the test piece is buckled on the pull rod, and the lower part of the test piece is connected to another chuck of the tensile testing machine.

[0009] Preferably, the clamping member includes:

[0010] A clamping part connected to the chuck of the tensile testing machine;

[0011] Two connecting parts are provided, which are respectively connected to both ends of the clamping part. Threaded holes are formed in the connecting parts, and sleeves are respectively connected to the two connecting parts. The pull rod passes through the two sleeves.

[0012] Preferably, the axis of the connecting part passes through the center line of the sleeve.

[0013] Preferably, the connecting member includes:

[0014] A connecting plate is provided with threaded holes, and the connecting plate is connected to the connecting part by bolts;

[0015] An arc-shaped fixture is connected to the connecting plate. The diameter of the arc-shaped fixture is the same as the maximum diameter of the test piece. The test piece is buckled on the pull rod and is in contact with the inner wall of the arc-shaped fixture.

[0016] Preferably, a graphite paper layer is provided on the inner wall of the arc-shaped fixture to improve the clamping effect of the arc-shaped fixture on the test piece.

[0017] Preferably, the diameter of the pull rod is the same as the minimum diameter of the test piece.

[0018] Another object of the embodiment of the present invention is to provide a method for using a drawing test device for a crimped upright lock seam support, including the following steps:

[0019] S1. Select a connecting member and a pull rod with corresponding sizes according to the size of the test piece, and fixedly connect the connecting member and the clamping member by bolts;

[0020] S2. Pass the pull rod through the two sleeves, then buckle the upper hook of the test piece on the pull rod, keep it vertically placed, and at the same time adjust the graphite paper layer to ensure that the test piece is in full contact with the connecting member;

[0021] S3. Clamp the clamping part and the lower part of the test piece on the upper and lower hydraulic chucks of the tensile testing machine respectively, adjust them to the middle position, and then the tensile testing machine can be started for the drawing test.

[0022] The drawing test device for the crimped upright locking joint support provided by the embodiment of the present invention can fill the blank that the existing drawing test cannot perform strength test on the crimped upright locking joint support. It is provided with a clamping member, a connecting member and a pull rod used in cooperation to realize the drawing test of the test piece. Connect the connecting member to the clamping member, pass the pull rod through the clamping member, then buckle the upper part of the test piece on the pull rod, and the two chucks of the tensile testing machine respectively clamp the upper part of the clamping member and the lower part of the test piece, and then the test can be carried out. This device can be used to detect the actual drawing bearing capacity of the crimped upright locking joint support. At the same time, different connecting members and pull rods can be selected according to the size of the test piece. Therefore, this device is applicable to crimped upright locking joint supports of various sizes. In addition, due to the existence of the clamping member, the whole set of test devices can be used on testing machines of different tonnages without replacing the hydraulic chuck of the testing machine, and the test can be carried out quickly, with simple operation and convenient use. Description of the Drawings

[0023] Figure 1 Structural diagrams of two connection forms of the standing seam metal roof panel in the prior art;

[0024] Figure 2 Structural schematic of a drawing test device for a crimped upright locking joint support provided by the embodiment of the present invention;

[0025] Figure 3 Structural schematic diagram of the clamping member in a drawing test device for a crimped upright locking joint support provided by the embodiment of the present invention;

[0026] Figure 4 Structural schematic diagram of the connecting member in a drawing test device for a crimped upright locking joint support provided by the embodiment of the present invention;

[0027] Figure 5 Structural schematic diagram of the pull rod in a drawing test device for a crimped upright locking joint support provided by the embodiment of the present invention.

[0028] In the drawings: 1 - test piece; 2 - clamping member; 21 - clamping part; 22 - connecting part; 23 - sleeve; 3 - connecting member; 31 - connecting plate; 32 - bolt; 33 - arc-shaped fixture; 34 - graphite paper layer; 4 - pull rod. Detailed Embodiment

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0031] As Figure 2As shown in the figure, it is a structural diagram of a drawing test device for a crimped upright lock seam support provided by an embodiment of the present invention. The device includes:

[0032] A clamping member 2, one side of the clamping member 2 is connected to the chuck of a tensile testing machine;

[0033] A connecting member 3, connected to the other side of the clamping member 2;

[0034] A pull rod 4, the pull rod 4 passes through the clamping member 2 and is located inside the connecting member 3. The upper hook of the test piece 1 is buckled on the pull rod 4, and the lower part of the test piece 1 is connected to another chuck of the tensile testing machine.

[0035] In an embodiment of the present invention, this drawing test device for a crimped upright lock seam support can fill the blank that the existing drawing test cannot perform strength testing on the crimped upright lock seam support. The clamping member 2, the connecting member 3 and the pull rod 4 are arranged to cooperate with each other to realize the drawing test of the test piece 1. Connect the connecting member 3 to the clamping member 2, pass the pull rod 4 through the clamping member 2, then buckle the upper part of the test piece 1 on the pull rod 4, and the two chucks of the tensile testing machine respectively clamp the upper part of the clamping member 2 and the lower part of the test piece 1, and then the test can be carried out. This device can be used to detect the actual drawing bearing capacity of the crimped upright lock seam support. At the same time, different connecting members 3 and pull rods 4 can be selected according to the size of the test piece 1. Therefore, this device is applicable to crimped upright lock seam supports of various sizes. In addition, due to the presence of the clamping member 2, the whole set of test devices can be used on testing machines of different tonnages without replacing the hydraulic chuck of the testing machine, and the test can be carried out quickly, with simple operation and convenient use.

[0036] As Figure 3 shown, as a preferred embodiment of the present invention, the clamping member 2 includes:

[0037] A clamping part 21, the clamping part 21 is connected to the chuck of the tensile testing machine;

[0038] Connecting parts 22, there are two connecting parts 22, which are respectively connected to both ends of the clamping part 21. Threaded holes are provided on the connecting parts 22, and sleeves 23 are respectively connected to the two connecting parts 22. The pull rod 4 passes through the two sleeves 23.

[0039] Specifically, the axis of the connecting part 22 passes through the center line of the sleeve 23.

[0040] The clamping part 21, the connecting part 22 and the sleeve 23 are connected by welding. The diameter of the sleeve 23 can be slightly larger than the diameter of the pull rod 4, which is convenient for installing the pull rod 4 during the test and can also prevent the pull rod 4 from flying out during the test, improving the safety of the test. The axis of the connecting part 22 is set to pass through the center line of the sleeve 23, so that when the specimen 1 is pulled to both sides, a positive tensile force is applied to the specimen 1, thereby reducing the influence of virtual displacement.

[0041] As Figure 4 shown, as a preferred embodiment of the present invention, the connecting member 3 includes:

[0042] A connecting plate 31, on which a threaded hole is opened, and the connecting plate 31 is connected to the connecting part 22 by a bolt 32;

[0043] An arc-shaped fixture 33, which is connected to the connecting plate 31. The diameter of the arc-shaped fixture 33 is the same as the maximum diameter of the specimen 1. The specimen 1 is buckled on the pull rod 4 and contacts the inner wall of the arc-shaped fixture 33.

[0044] Specifically, a graphite paper layer 34 is provided on the inner wall of the arc-shaped fixture 33 to improve the clamping effect of the arc-shaped fixture 33 on the specimen 1.

[0045] The diameter of the arc-shaped fixture 33 is the same as the maximum diameter of the specimen 1, which plays the role of simulating the outer roof panel of the support in the pull-out test. A graphite paper layer 34 is provided on the contact surface between the arc-shaped fixture 33 and the specimen 1. The graphite paper layer 34 separates the specimen 1 from the arc-shaped fixture 33, making up for the non-parallelism and non-smoothness of the contact surface between the specimen 1 and the arc-shaped fixture 33 caused by processing, thereby improving the clamping effect of the arc-shaped fixture 33 on the specimen 1 and ensuring their complete contact. The connecting member 3 can be correspondingly replaced by the bolt 32 according to the different sizes of the specimen 1, so as to meet the test requirements of specimens 1 of various sizes.

[0046] As Figure 5 shown, as a preferred embodiment of the present invention, the diameter of the pull rod 4 is the same as the minimum diameter of the specimen 1.

[0047] The diameter of the pull rod 4 is the same as the minimum diameter of the specimen 1, ensuring that the specimen 1 can be well buckled on the pull rod 4 during the test, and the connection between them is strong enough, playing the role of simulating the inner roof panel of the support in the pull-out test.

[0048] The usage method of the above-mentioned crimped standing seam support pull-out test device includes the following steps:

[0049] S1. Select the connecting piece 3 and the tension rod 4 with corresponding sizes according to the size of the test piece 1, and fixedly connect the connecting piece 3 and the clamping piece 2 through the bolt 32;

[0050] S2. Pass the tension rod 4 through the two sleeves 23, then buckle the upper hook of the test piece 1 on the tension rod 4, keep it vertically placed, and at the same time adjust the graphite paper layer 34 to ensure that the test piece 1 is in full contact with the connecting piece 3;

[0051] S3. Clamp the clamping part 21 and the lower part of the test piece 1 on the upper and lower hydraulic chucks of the tensile testing machine respectively, adjust it to the middle position, and then the tensile testing machine can be started for the pulling test.

[0052] Using this test device can more realistically simulate the stress condition of the crimped standing seam support in the overall roof panel, making the test situation more in line with the actual situation, with high test result accuracy, good reliability and repeatability.

[0053] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drawing test device for a curled edge type standing seam support, characterized in that, The device includes: a clamping member (2), one side of the clamping member (2) is connected to the chuck of a tensile testing machine; a connecting member (3), connected to the other side of the clamping member (2); a pull rod (4), the pull rod (4) passes through the clamping member (2) and is located inside the connecting member (3), the upper hook of the test piece (1) is buckled on the pull rod (4), and the lower part of the test piece (1) is connected to another chuck of the tensile testing machine; The clamping member (2) includes: a clamping part (21), the clamping part (21) is connected to the chuck of the tensile testing machine; connecting parts (22), there are two connecting parts (22), which are respectively connected to both ends of the clamping part (21), threaded holes are provided on the connecting parts (22), sleeves (23) are respectively connected to the two connecting parts (22), and the pull rod (4) passes through the two sleeves (23); The connecting member (3) includes: a connecting plate (31), a threaded hole is also provided on the connecting plate (31), and the connecting plate (31) is connected to the connecting part (22) by a bolt (32); an arc-shaped fixture (33), the arc-shaped fixture (33) is connected to the connecting plate (31), the diameter of the arc-shaped fixture (33) is the same as the maximum diameter of the test piece (1), the test piece (1) is buckled on the pull rod (4) and is in contact with the inner wall of the arc-shaped fixture (33).

2. The curling type standing seam support pulling test device according to claim 1, wherein The axis of the connecting part (22) passes through the center line of the sleeve (23).

3. The curling type standing seam support pull-out test device according to claim 1, wherein A graphite paper layer (34) is provided on the inner wall of the arc-shaped fixture (33) to improve the clamping effect of the arc-shaped fixture (33) on the test piece (1).

4. The curling type standing seam support pull-out test device according to claim 1, characterized in that, The diameter of the pull rod (4) is the same as the minimum diameter of the test piece (1).

5. A method for using the drawing test device of the crimped upright lock seam support according to claim 4, characterized in that, It includes the following steps: S1. Select the connecting member (3) and the pull rod (4) with corresponding sizes according to the size of the test piece (1), and fixedly connect the connecting member (3) to the clamping member (2) by bolts (32); S2. Pass the pull rod (4) through the two sleeves (23), then buckle the upper hook of the test piece (1) on the pull rod (4), keep it vertically placed, and at the same time adjust the graphite paper layer (34) to ensure that the test piece (1) is in full contact with the connecting member (3); S3. Clamp the clamping part (21) and the lower part of the test piece (1) on the upper and lower hydraulic chucks of the tensile testing machine respectively, adjust it to the middle position, and then the tensile testing machine can be started for the pulling test.

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