Steel pipe fatigue strength detection equipment

Abstract

The invention discloses steel pipe fatigue strength detection equipment, and belongs to the technical field of detection tables. The device mainly comprises a detection table; the placing assembly is arranged at the top of the detection table, the placing assembly comprises a sliding rail, two groups of bearing plates are installed on the sliding rail in a sliding mode, and the tops of the bearing plates are rotationally connected with adjusting plates; the support is arranged at the top of the adjusting plate, and a supporting block is rotationally connected to the center of the top of the support; the portal frame is arranged at the top of the detection table, an air cylinder is fixedly installed at the top of the portal frame, the output end of the air cylinder is connected with a pressure sensor, and a press-fitting head is installed at the bottom of the pressure sensor. According to the steel pipe fatigue strength detection equipment, by arranging the press-fitting head capable of freely installing the punch, three-point or four-point type fatigue testing of the steel pipe can be easily achieved, and meanwhile by arranging the placement assembly capable of adjusting the inclination angle, the testing requirements of the steel pipe under different angles and conditions can be met.

Description

Technical Field

[0001] The present application relates to the technical field of testing benches, and in particular to a steel pipe fatigue strength testing device. Background Art

[0002] The three-point bending fatigue testing machine is a test method that applies a concentrated load on the specimen to cause bending deformation between two supporting points, thereby evaluating the material's mechanical properties such as bending strength and fatigue life. During the test, the upper pressure head moves downward at a constant rate or in a cyclic loading manner to apply pressure to the specimen until the specimen reaches the predetermined failure condition or completes a predetermined number of cyclic loading cycles.

[0003] For example, the patent with publication number CN106501095A specifically discloses an adjustable three-point bending strength tester, which can adjust the distance between the first pressure plate and the second pressure plate through the track pair, thereby adapting to the size and test requirements of different workpieces.

[0004] In the above patent, the testing machine is convenient for testing workpieces of different sizes by setting two sets of pressure plates with freely adjustable distances. However, the heights of the two sets of pressure plates in the device are fixed, so that the steel pipe can only be placed horizontally on the top of the pressure plate. When it is necessary to simulate the pressure test of the workpiece in different scenarios (such as oblique installation), due to the fixed height of the pressure plate, the steel pipe can only be placed horizontally on the top of the pressure plate, and the pressure condition during oblique installation cannot be simulated. This limits the application of the testing machine in evaluating the mechanical properties and pressure bearing capacity of the workpiece at different installation angles, and reduces the flexibility of the device. Therefore, it is necessary to provide a steel pipe fatigue strength testing device with adjustable installation angle to solve the above problems.

[0005] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a steel pipe fatigue strength testing device to achieve the effect of freely changing the installation angle of the workpiece.

[0007] The technical solution adopted by the present application to solve its technical problems is: a steel pipe fatigue strength testing device, including a testing platform; a placement component, which is arranged on the top of the testing platform, the placement component includes a slide rail, on which two groups of supporting plates are slidably installed, and the top of the supporting plate is rotatably connected to an adjustment plate; a bracket, which is arranged on the top of the adjustment plate, and the center of the top of the bracket is rotatably connected to a support block, and the support block is suitable for carrying the steel pipe; a gantry, which is arranged on the top of the testing platform, and a cylinder is fixedly installed on the top of the gantry, and the output end of the cylinder passes through the gantry and is connected to a pressure sensor through a coupling, and a pressing head is installed at the bottom of the pressure sensor, and the pressing head is used to apply pressure to the steel pipe on the top of the support block.

[0008] Furthermore, two sets of bearing seats are installed on the top of the support plate, a screw is rotatably connected between the two sets of bearing seats, an adjustment block is threadedly connected to the screw, and two sets of connecting rods are rotatably connected to the bottom of the adjustment plate, and one end of the connecting rod away from the adjustment plate is rotatably connected to the adjustment block.

[0009] Furthermore, the press-fitting head includes a base, two groups of slide grooves are arranged on the outer side of the base, multiple groups of through holes are arranged in the slide grooves, a first punch is slidably installed in the two groups of slide grooves, and a through connecting hole is arranged on the back side of the first punch.

[0010] Furthermore, a scale mark is installed on the top of the slide groove, and arrows are arranged on the outer sides of the two groups of first punches, and the arrows are matched with the scale mark.

[0011] Furthermore, a second punch is provided on the base, a thread is provided on the top of the second punch, and a threaded hole matching the second punch is provided on the bottom of the base.

[0012] Furthermore, both sides of the second punch are provided with insert blocks, and mounting holes are arranged on the two groups of first punches, and the sizes of the insert blocks and the mounting holes are adapted to each other.

[0013] The beneficial effect of the present application is that the present application provides a steel pipe fatigue strength testing device, which can easily realize three-point or four-point fatigue testing of steel pipes by setting a pressing head on which a punch can be freely installed, thereby meeting a variety of different testing needs. At the same time, by setting a placement component with an adjustable tilt angle, it can meet the testing needs of steel pipes at different angles and conditions, thereby comprehensively understanding the performance characteristics of steel pipes and providing strong data support for subsequent use and design.

[0014] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0016] In the attached picture:

[0017] Figure 1 This is an overall schematic diagram of a steel pipe fatigue strength testing device in this application;

[0018] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure in which components are placed;

[0020] Figure 4 for Figure 3 A schematic diagram of the side structure in which components are placed;

[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the medium pressure component;

[0022] Figure 6 This is a schematic diagram of the installation of the press head;

[0023] Figure 7 for Figure 6 Schematic diagram of the structure of the medium pressure loading head;

[0024] Among them, the reference numerals in the figure are:

[0025] 1. Testing table; 11. Gantry;

[0026] 2. Placement assembly; 21. Slide rail; 22. Support plate; 23. Bearing seat; 24. Screw rod; 241. Adjustment block; 25. Adjustment plate; 26. Connecting rod; 27. Indicator plate;

[0027] 3. bracket; 31. support block; 32. groove;

[0028] 4. Pressure assembly; 41. Cylinder; 42. Pressure sensor;

[0029] 5. Press-fitting head; 51. Base; 52. Slide; 53. First punch; 531. Mounting hole; 54. Arrow; 55. Scale mark;

[0030] 6. Additional components; 61. Second punch; 62. Insert block. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0033] like Figure 1-Figure 4 As shown, the present application provides a steel pipe fatigue strength testing device, including a testing platform 1, which is arranged in a steel processing plant and is used to perform fatigue testing on the steel after production to determine its performance and strength. A placement component 2 is arranged on the top of the testing platform 1, and the placement component 2 is used to fix the steel pipe. At the same time, a pressure component 4 is arranged on the top of the placement component 2, and the pressure component 4 is used to apply pressure to the steel pipe on the top of the placement component 2 and determine the maximum bearing pressure of the steel pipe;

[0034] The placement component 2 includes a slide rail 21, which is fixedly mounted on the top of the detection platform 1. At the same time, two groups of supporting plates 22 are slidably mounted on the slide rail 21. A slider is provided at the bottom of the supporting plate 22, and the slider is slidably connected to the slide rail 21. The supporting plate 22 is suitable for reciprocating on the slide rail 21 with the cooperation of the slider. At the same time, a plurality of groups of threaded holes are provided on the slide rail 21, and through holes are provided at positions corresponding to the threaded holes on the supporting plate 22. When the position of the supporting plate 22 is determined, the supporting plate 22 can be fixed on the slide rail 21 by installing bolts in the through holes and the threaded holes.

[0035] At the same time, two groups of bearing seats 23 are fixedly installed on the top of the supporting plate 22, and a screw rod 24 is rotatably connected between the two groups of bearing seats 23, and an adjustment block 241 is threadedly connected to the screw rod 24. At the same time, an adjustment plate 25 is rotatably installed on the supporting plate 22, and the adjustment plate 25 is located above the screw rod 24, and two groups of connecting rods 26 are rotatably connected at the bottom of the adjustment plate 25, and one end of the connecting rod 26 away from the adjustment plate 25 is rotatably connected to the adjustment block 241;

[0036] When it is necessary to control the angle of the adjustment plate 25 on the bearing seat 23, the adjustment block 241 can be driven to move on the screw 24 by rotating the screw 24, thereby driving the angle of the adjustment plate 25 to change to adapt to different installation environments, and an indicator plate 27 is also fixedly installed on the support plate 22, and an angle mark is set on the indicator plate 27 to assist the staff in changing the rotation angle of the adjustment plate 25;

[0037] Two groups of brackets 3 are fixedly installed on the top of the adjustment plate 25, and a support block 31 is rotatably connected at the center of the top of the two groups of brackets 3. The support block 31 is made of a magnet and is used to adsorb and fix the steel pipe to be tested. An arc-shaped groove 32 is set in the center of the support block 31. The groove 32 is suitable for contacting with the steel, so that the steel pipe is firmly installed on the top of the two groups of placement components 2.

[0038] like Figure 1 , Figure 5-Figure 7 As shown, a gantry 11 is also provided on the top of the test bench 1, and a pressure assembly 4 is provided on the gantry 11. The pressure assembly 4 includes a cylinder 41 fixedly installed on the top of the gantry 11. The output end of the cylinder 41 passes through the gantry 11 and is connected to a pressure sensor 42 through a coupling. At the same time, a press head 5 is fixedly installed at the bottom of the pressure sensor 42, and the press head 5 is used to apply pressure to the steel pipe;

[0039] The press fitting head 5 comprises a base 51, two groups of slide grooves 52 are arranged on the outer side of the base 51, and a plurality of through holes are arranged in the slide grooves 52. At the same time, first punches 53 are slidably installed in the two groups of slide grooves 52, and a through connection hole (not shown in the figure) is arranged on the back side of the first punch 53. The two groups of first punches 53 are used to contact the top of the steel pipe. The press fitting head 5 is used to apply necessary pressure to the steel pipe to deform or rupture the steel pipe, so as to realize the four-point fatigue test of the steel pipe.

[0040] At the same time, in order to improve the convenience and accuracy of the device, a scale mark 55 is installed on the top of the slide 52, and an arrow 54 is set on the outside of the two groups of first punches 53. The arrow 54 is compatible with the scale mark 55, so that the staff can easily confirm the precise installation position of the two groups of first punches 53 in the slide 52, and once the installation position of the first punch 53 is determined, it is only necessary to simply insert the plug into the connecting hole and the through hole to firmly fix the two groups of first punches 53 on the base 51, which not only improves the efficiency and accuracy of the steel pipe fatigue test, but also reduces the difficulty of operation, so that the staff can complete the test task more easily and accurately.

[0041] At the same time, in order to adapt to various testing requirements, an additional component 6 is also provided on the base 51, and the additional component 6 includes a second punch 61, and the second punch 61 is used to perform a three-point test on the steel pipe, and a thread is provided on the top of the second punch 61, and a threaded hole adapted thereto is provided at the bottom of the base 51, so that the second punch 61 can be quickly installed on the base 51;

[0042] In order to make the installation of the second punch 61 more stable, there are plug blocks 62 on both sides of the second punch 61, and mounting holes 531 are provided on the two groups of first punches 53. The plug blocks 62 are adapted to the size of the mounting holes 531, so that after the second punch 61 is installed at the bottom of the base 51, the two groups of first punches 53 can be fixed to the second punch 61 through the cooperation of the plug blocks 62 and the mounting holes 531. Such a design not only makes the installation process of the second punch 61 simpler and faster, but also improves the stability of the press-fitting head 5 during the test process. Moreover, through the flexible combination of the first punch 53 and the second punch 61, the press-fitting head 5 can easily realize the three-point or four-point fatigue test of the steel pipe, thereby meeting a variety of different test requirements.

[0043] When the steel pipe needs to be tested at different angles, the screw 24 of one set of the placement components 2 can be rotated to drive the angle of the adjustment plate 25 to change, and then the steel pipe can be placed on the inclined bracket 3 and the support block 31 on the top of the flat bracket 3. At the same time, since the support block 31 is made of magnets, it can firmly fix the steel pipe, so that the steel pipe can be stable and motionless even in the inclined state;

[0044] Then, according to the test needs, the second punch 61 is installed or removed from the press head 5, and the cylinder 41 is turned on to drive the press head 5 to move toward the steel pipe. At this time, the first punch 53 or the second punch 61 will contact the steel pipe and squeeze and deform the steel pipe, and transmit the force data of the steel pipe to the external receiving device through the pressure sensor 42, thereby completing the test of the steel pipe.

[0045] In summary, the device, by providing a pressing head 5 on which a punch can be freely installed, can easily realize three-point or four-point fatigue testing on steel pipes, thereby meeting a variety of different testing requirements. At the same time, by providing a placement component 2 with an adjustable tilt angle, it can meet the testing requirements of steel pipes at different angles and conditions, thereby fully understanding the performance characteristics of the steel pipes and providing strong data support for subsequent use and design.

[0046] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel pipe fatigue strength testing device, characterized in that: include: Testing station (1); A placement component (2), the placement component (2) being arranged on the top of the detection platform (1), the placement component (2) comprising a slide rail (21), two groups of support plates (22) being slidably mounted on the slide rail (21), and an adjustment plate (25) being rotatably connected to the top of the support plate (22); A bracket (3), the bracket (3) being arranged on the top of the adjusting plate (25), a support block (31) being rotatably connected at the center of the top of the bracket (3), the support block (31) being suitable for bearing a steel pipe; A gantry (11) is arranged on the top of the detection platform (1), a cylinder (41) is fixedly installed on the top of the gantry (11), an output end of the cylinder (41) passes through the gantry (11) and is connected to a pressure sensor (42) through a coupling, a pressing head (5) is installed at the bottom of the pressure sensor (42), and the pressing head (5) is used to apply pressure to the steel pipe on the top of the support block (31).

2. A steel pipe fatigue strength testing device according to claim 1, characterized in that: Two groups of bearing seats (23) are installed on the top of the supporting plate (22), a screw rod (24) is rotatably connected between the two groups of bearing seats (23), an adjustment block (241) is threadedly connected to the screw rod (24), and two groups of connecting rods (26) are rotatably connected to the bottom of the adjustment plate (25), and one end of the connecting rod (26) away from the adjustment plate (25) is rotatably connected to the adjustment block (241).

3. The steel pipe fatigue strength testing device according to claim 1, characterized in that: The press-fitting head (5) comprises a base (51), two groups of slide grooves (52) are arranged on the outer side of the base (51), a plurality of through holes are arranged in the slide grooves (52), a first punch (53) is slidably installed in the two groups of slide grooves (52), and a through connection hole is arranged on the back side of the first punch (53).

4. A steel pipe fatigue strength testing device according to claim 3, characterized in that: A scale mark (55) is installed on the top of the slide groove (52), and arrows (54) are arranged on the outer sides of the two groups of the first punches (53), and the arrows (54) are matched with the scale mark (55).

5. The steel pipe fatigue strength testing device according to claim 4, characterized in that: The base (51) is also provided with a second punch (61), the top of the second punch (61) is provided with a thread, and the bottom of the base (51) is provided with a threaded hole matching the second punch.

6. A steel pipe fatigue strength testing device according to claim 5, characterized in that: Insert blocks (62) are provided on both sides of the second punch (61), and mounting holes (531) are provided on the two groups of the first punches (53), and the sizes of the insert blocks (62) and the mounting holes (531) are adapted.

7. The steel pipe fatigue strength testing device according to claim 1, characterized in that: The support block (31) is made of a magnet, and an arc-shaped groove (32) is arranged at the center of the support block (31).

8. The steel pipe fatigue strength testing device according to claim 1, characterized in that: An indicator plate (27) is fixedly mounted on the supporting plate (22), and an angle mark is arranged on the indicator plate (27).

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