Bending strength detection clamp for construction steel pipe

Abstract

The utility model relates to a bending strength detection fixture for construction steel pipes, which belongs to the technical field of steel pipe detection fixtures and comprises a detection table, adjustable steel pipe fixtures are oppositely mounted on the detection table, movable columns capable of moving are arranged on a limiting block in a mirroring manner, and a mounting groove is formed in the upper end of the limiting block and positioned between the two movable columns. A clamping block for limiting the steel pipe is installed on the movable column, and an adjusting reset device for driving the movable column to move up and down is installed on the limiting block. After the structure is adopted, the device has the following advantages that the clamping block is driven by the adjusting reset device to downwards clamp a steel pipe, the steel pipe is fixed by the clamping block and the mounting groove at three points, three-point bending occurs when three contact points form two equal moments, a specimen is broken at the middle point, and bending strength detection is formed; and after the bending strength detection is finished, when resetting is needed, the reset spring pushes the clamping block to be upward, and the clamping block can be easily disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe detection fixtures, in particular to a bending strength detection fixture for construction steel pipes. Background Art

[0002] As the main raw material of the construction industry, the bending resistance of steel pipes is particularly important. The testing process of the bending resistance of steel pipes is generally as follows: place the specimen on two supporting points at a certain distance, apply a downward load to the specimen at the midpoint of the two supporting points, and three-point bending occurs when the three contact points of the specimen form two equal moments, and the specimen will break at the midpoint.

[0003] The three-point bending test is commonly used to test the bending strength of various materials; for example, the existing patent, application number CN201720662064.7, is a bending strength test fixture for steel pipes, including a base, a lifting rod, a fixture platform, a left clamping unit, a right clamping unit, a hydraulic cylinder, a hydraulic cylinder seat, a push rod, a pressure head, a steel pipe to be tested and a pressure sensor; the fixture platform is supported by a plurality of lifting rods below and arranged above the base, the fixture platform is arranged horizontally, and the table of the fixture platform is provided with two guide rails in parallel, and the length direction of the guide rails is parallel to the horizontal X direction; the left clamping unit and the right clamping unit are slidably arranged on the two guide rails through the sliders at the bottom thereof, and the steel pipe to be tested is arranged horizontally, and the two ends of the steel pipe to be tested are respectively connected with the clamping of the left clamping unit and the right clamping unit. However, the existing bending strength test fixture of steel pipes has a complex structure, and after the force test of the steel pipe is completed, the fixture will be stuck in the fixture, and it is impossible or difficult to disassemble, which affects the test efficiency. Utility Model Content

[0004] The utility model aims to solve the above technical problems and provides a bending strength detection fixture for construction steel pipes.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] A bending strength testing fixture for a construction steel pipe comprises a testing platform, on which adjustable steel pipe fixtures are relatively mounted;

[0007] The steel pipe clamp comprises a bottom plate installed on the inspection table, a limit block is installed on the bottom plate, a movable groove is provided in the limit block, a movable movable column is mirrored on the limit block and the movable column passes through the limit block and extends into the movable groove, an installation groove is provided at the upper end of the limit block and located between the two movable columns, and a clamping block for limiting the steel pipe is installed on the movable column;

[0008] The limit block is provided with an adjusting and resetting device for driving the movable column to move up and down.

[0009] Preferably, the mounting groove is a V-shaped structure, and the lower end of the clamping block is chamfered.

[0010] Preferably, a movable hole for cooperating with the movable column is provided on the limit block.

[0011] Preferably, the adjustment and resetting device includes two cross bars and a connecting block between the two cross bars, the movable column is relatively provided with a limiting column for limiting the cross bar, the cross bar is located between the limiting columns, a screw is threadedly connected in the limiting block, and a pushing block is eccentrically installed on the outside of the screw and located in the movable groove to push the connecting block to move.

[0012] Preferably, a return spring is installed between the connecting block and the detection platform.

[0013] Preferably, rotating disks are installed at both ends of the screw.

[0014] Preferably, a threaded hole used in conjunction with the screw rod is provided in the limit block and the threaded hole is connected to the movable groove, and a fixing nut is installed on the outside of the screw rod and on the outside of the limit block.

[0015] After adopting the above structure, the utility model has the following advantages:

[0016] The utility model drives the clamping block to clamp the steel pipe downward by adjusting the reset device. The clamping block and the installation groove fix the steel pipe at three points. When the three contact points form two equal moments, three-point bending occurs. The specimen will break at the midpoint, forming a bending strength test. When the bending strength test is completed and reset is required, the reset spring will push the clamping block upward and it can be easily disassembled.

[0017] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a cross-sectional view of the steel pipe clamp of the utility model;

[0021] Figure 3 It is a schematic diagram of the internal structure of the adjustment and reset device of the utility model;

[0022] Figure 4 It is a schematic diagram of steel pipe installation of the utility model.

[0023] As shown in the figure: 1. Testing table; 2. Steel pipe clamp; 21. Bottom plate; 22. Limit block; 23. Movable groove; 24. Movable column; 25. Mounting groove; 26. Clamp; 3. Adjustment and reset device; 31. Cross bar; 32. Connecting block; 33. Limit column; 34. Screw; 35. Push block; 4. Moving hole; 5. Reset spring; 6. Rotating disk; 7. Fixing nut. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] The utility model is further described in detail below in conjunction with the full text.

[0027] Combined with Figure 1-Figure 4 A bending strength testing fixture for a construction steel pipe comprises a testing platform 1, on which an adjustable steel pipe clamp 2 is relatively installed. Specifically, the steel pipe is fixed on the testing platform 1 by the steel pipe clamp 2, and a hydraulic cylinder is installed on the testing platform 1. The hydraulic cylinder is installed on the testing platform 1 through a fixing plate. The telescopic end of the hydraulic cylinder is located above the steel pipe. The telescopic end of the hydraulic cylinder moves downward to push the steel pipe, which acts as a downward load force on the steel pipe. The steel pipe clamp 2 forms a supporting force on the steel pipe. When two equal moments are formed at the three contact points, three-point bending occurs, and the specimen will break at the midpoint, forming a bending strength test.

[0028] When the utility model is implemented, Figure 1-Figure 3As shown, the steel pipe clamp 2 includes a base plate 21 installed on the inspection table 1, a limit block 22 is installed on the base plate 21, a movable groove 23 is opened in the limit block 22, a movable movable column 24 is mirrored on the limit block 22, and the movable column 24 passes through the limit block 22 and extends into the movable groove 23, a mounting groove 25 is opened at the upper end of the limit block 22 and located between the two movable columns 24, a clamping block 26 for limiting the steel pipe is installed on the movable column 24, when the movable column 24 moves downward in the movable hole 4 driven by the adjusting reset device 3, the two clamping blocks 26 and the mounting groove 25 fix the steel pipe at three points, the mounting groove 25 is a V-shaped structure, the lower end of the clamping block 26 is chamfered, the steel pipe is located in the mounting groove 25, and the chamfer of the clamping block 26 fits the steel pipe to move downward, so that the steel pipe is firmly installed in the mounting groove 25.

[0029] The limit block 22 is provided with a movable hole 4 for cooperating with the movable column 24 .

[0030] When the utility model is implemented, Figure 2 and Figure 3 The limit block 22 is provided with an adjustment and reset device 3 for driving the movable column 24 to move up and down. The adjustment and reset device 3 includes two cross bars 31 and a connecting block 32 between the two cross bars 31. The movable column 24 is provided with a limit column 33 for limiting the cross bar 31. The cross bar 31 is located between the limit columns 33. A screw rod 34 is threadedly connected in the limit block 22. A push block 35 for pushing the connecting block 32 to move is installed eccentrically in the movable groove 23 and outside the screw rod 34. Specifically, when the manually rotating screw rod 34 rotates in the threaded hole, the push block 35 is driven to rotate. The push block 35 is a cylindrical The push block 35 is eccentrically installed on the outside of the screw rod 34, so it will push the connecting block 32 to move downward, thereby driving the cross bar 31 to move downward. Through the restriction of the limit column 33, the movable column 24 is driven to move downward in the movable hole 4, so that the clamping block 26 clamps the steel pipe downward. A threaded hole for matching the screw rod 34 is provided in the limit block 22, and the threaded hole is connected to the movable groove 23. A fixing nut 7 is installed on the outside of the screw rod 34 and located on the outside of the limit block 22. The fixing nut 7 can be rotated on the outside of the screw rod 34 close to the limit block 22 to fix the screw rod 34.

[0031] A reset spring 5 is installed between the connecting block 32 and the testing platform 1. Specifically, when the connecting block 32 moves downward, the reset spring 5 is compressed. When the bending strength test is completed and it needs to be reset, the reset spring 5 will push the clamping block 26 upward, which can be easily disassembled. When installing, a spring installation groove is opened on the inner side of the lower end of the connecting block 32.

[0032] Rotating disks 6 are installed at both ends of the screw rod 34. Specifically, the rotating disks 6 can quickly rotate the screw rod 34 in the threaded hole.

[0033] The working principle of this utility model:

[0034] like Figure 4 As shown, the steel pipe is installed in the installation groove 25, and the manually rotating screw rod 34 rotates in the threaded hole to drive the pushing block 35 to rotate. The pushing block 35 is a cylindrical structure. Because the pushing block 35 is eccentrically installed on the outside of the screw rod 34, it will push the connecting block 32 to move downward, thereby driving the cross bar 31 to move downward. Through the restriction of the limit column 33, the movable column 24 is driven to move downward in the moving hole 4, so that the clamping block 26 clamps the steel pipe downward. The two clamping blocks 26 and the installation groove 25 fix the steel pipe at three points. The fixing nut 7 is rotated on the outside of the screw rod 34 close to the limit block 22 to fix the screw rod 34. The hydraulic cylinder is installed on the test bench 1 through the fixing plate. The telescopic end of the hydraulic cylinder is located above the steel pipe. The telescopic end of the hydraulic cylinder moves downward to push the steel pipe as the downward load force of the steel pipe. The steel pipe clamp 2 forms a supporting force on the steel pipe. When the three contact points form two equal moments, three-point bending occurs. The specimen will break at the midpoint to form a bending strength test.

[0035] The above describes the utility model and its implementation methods, which is not restrictive. What is shown in the full text is only one of the implementation methods of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A bending strength testing fixture for a construction steel pipe, comprising a testing platform (1), characterized in that: An adjustable steel pipe clamp (2) is relatively mounted on the testing platform (1); The steel pipe clamp (2) comprises a base plate (21) mounted on the inspection platform (1), a limit block (22) mounted on the base plate (21), a movable groove (23) being provided in the limit block (22), a movable movable column (24) being provided on the limit block (22) in a mirror image, and the movable column (24) passes through the limit block (22) and extends into the movable groove (23), a mounting groove (25) is provided at the upper end of the limit block (22) and located between the two movable columns (24), and a clamp block (26) for limiting the steel pipe is mounted on the movable column (24); The limit block (22) is provided with an adjusting and resetting device (3) for driving the movable column (24) to move up and down.

2. A bending strength testing fixture for construction steel pipes according to claim 1, characterized in that: The mounting groove (25) is a V-shaped structure, and the lower end of the clamping block (26) is chamfered.

3. A bending strength testing fixture for construction steel pipes according to claim 1, characterized in that: The limit block (22) is provided with a movable hole (4) for use with the movable column (24).

4. A bending strength testing fixture for construction steel pipes according to claim 1, characterized in that: The adjustment and reset device (3) comprises two cross bars (31) and a connecting block (32) between the two cross bars (31); a limiting column (33) for limiting the cross bars (31) is arranged on the movable column (24) in a relative manner; the cross bar (31) is located between the limiting columns (33); a screw rod (34) is threadedly connected in the limiting block (22); and a pushing block (35) for pushing the connecting block (32) to move is installed outside the screw rod (34) and eccentrically in the movable groove (23).

5. A bending strength testing fixture for construction steel pipes according to claim 4, characterized in that: A return spring (5) is installed between the connecting block (32) and the detection platform (1).

6. A bending strength testing fixture for construction steel pipes according to claim 4, characterized in that: Rotating disks (6) are mounted on both ends of the screw rod (34).

7. A bending strength testing fixture for construction steel pipes according to claim 4, characterized in that: A threaded hole for use with the screw rod (34) is provided in the limit block (22), and the threaded hole is connected to the movable groove (23). A fixing nut (7) is installed on the outside of the screw rod (34) and on the outside of the limit block (22).

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