A steel pipe strength testing machine

Abstract

The utility model discloses a kind of steel pipe strength testing machines, including machine table, two supporting arms of left and right distribution are provided on the machine table, two the supporting arms are commonly connected with lifting plate, the downside of the lifting plate is equipped with tension sensor, and the downside of the tension sensor and the upside of the machine table are respectively equipped with one chuck assembly;The chuck assembly includes mounting seat, two oppositely arranged sliding plates are slidably connected on the mounting seat, the sliding plate is equipped with outer clamping plate, and the relative position relationship is adjusted by locking member between two the sliding plates, the mounting seat between two the sliding plates is also equipped with inner support column, the utility model is used to carry out tension test to steel pipe, and the chuck assembly for clamping steel pipe in the utility model can be locked to steel pipe by the way of inner support opening, outer clamping, avoid steel pipe clamping when producing too large deformation, influence test result, improve the reliability of test result.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe testing technology, and in particular to a steel pipe strength testing machine. Background Technology

[0002] After production, steel pipes usually need to undergo tensile testing to obtain the basic mechanical properties of that batch of steel pipes.

[0003] Currently, tensile testing machines are commonly used to perform the above tests on steel pipes. However, ordinary tensile testing machines typically use only ordinary clamps to hold the steel pipes before testing. When ordinary clamps hold the steel pipes, the contact area between them and the steel pipes is small, making it easy for the steel pipes to slip off during testing. Furthermore, if the clamping force is too great, the steel pipes are prone to deformation, and the deformed parts of the steel pipes are likely to break during testing, affecting the test results. Therefore, improvements are needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a steel pipe strength testing machine to solve the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a steel pipe strength testing machine, including a machine base, two support arms distributed on the left and right sides of the machine base, a lifting plate connected between the two support arms, and a lifting control mechanism for controlling the lifting of the lifting plate. A tension sensor is installed on the lower side of the lifting plate, and a clamp assembly is installed on the lower side of the tension sensor and the upper side of the machine base respectively. The clamp assembly includes a mounting base with two opposing sliding plates slidably connected to it. Each sliding plate contains an outer clamping plate, and the relative position of the two sliding plates is adjusted by a locking device. An inner support column is also installed in the mounting base between the two sliding plates.

[0006] Preferably, the locking member includes an adjusting shaft that passes through a through hole in the left side clamping plate, a limiting ring that abuts against the left side sliding plate is provided on the curved surface of the adjusting shaft, and the adjusting shaft extends laterally and is threadedly connected to the right side sliding plate; A handle is provided through the adjusting shaft, and the handle is located on the left side of the limiting ring.

[0007] Preferably, the locking member is provided in two sets distributed on the front and rear sides of the clamping plate, and the two grips in the same clamping head assembly are staggered left and right.

[0008] Preferably, the upper end of the inner support column is integrally formed with multiple outwardly expanding arc panels. The outwardly expanding arc panels are arranged at equal angles with the axis of the inner support column as the center, and there is a gap between each outwardly expanding arc panel. The upper end surface of the outwardly expanding arc panel is chamfered with its inner curved surface near the axis of the inner support column to form an oblique concave surface. It also includes an inverted cone column, the conical surface of which is attached to the oblique concave surface in each outwardly expanding arc panel. It also includes an inner support control device for controlling the up and down position of the inverted cone column, thereby controlling the outward expansion of the outwardly expanding arc panel.

[0009] Preferably, the internal support control device includes a control groove disposed in the mounting base, a controlled rod integrally formed on the end face of the inverted conical column extending into the control groove, and an inclined block fixed at the end of the controlled rod, a translation block that can abut against the inclined surface inside the inclined block is slidably connected in the control groove, and a control shaft is rotatably connected in the mounting base, the control shaft being horizontally placed and threadedly connected to the translation block.

[0010] Preferably, the end of the control shaft extending outside the mounting base is fitted with a swivel cap.

[0011] Preferably, the lifting control mechanism includes a slide groove disposed in the support arm, a vertically arranged threaded shaft that is threadedly connected to the support arm in the slide groove, the two threaded shafts in the support arms are threadedly connected to the lifting plate, and the machine base is provided with a motor for driving the threaded shaft to rotate.

[0012] This utility model provides a steel pipe strength testing machine, which has the following beneficial effects: This utility model is used for tensile testing of steel pipes. The clamping assembly inside this utility model can lock the steel pipe by internal expansion and external clamping, so as to avoid excessive deformation of the steel pipe during clamping, which would affect the test results and improve the reliability of the test results. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the appearance of this utility model; Figure 2 yes Figure 1 A schematic diagram of the chuck assembly located on the lower side; Figure 3 yes Figure 2 A schematic diagram of the main structure inside the center clamp assembly; Figure 4 This is the front view of this utility model.

[0014] In the picture: 11. Machine base; 12. Support arm; 13. Lifting plate; 14. Tension sensor; 21. Mounting base; 22. Slide plate; 23. Inner support column; 24. Clamping plate; 25. Adjusting shaft; 26. Limiting ring; 27. Handle; 31. Outwardly expanding arc panel; 32. Inverted cone column; 41. Control groove; 42. Controlled rod; 43. Inclined block; 44. Translation block; 45. Control shaft; 51. Threaded shaft. Detailed Implementation

[0015] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Reference Figures 1-4According to an embodiment of the steel pipe strength testing machine of the present invention, it includes a machine base 11, on which two support arms 12 are arranged on the left and right sides, and a lifting plate 13 is connected between the two support arms 12. It also includes a lifting control mechanism for controlling the lifting of the lifting plate 13. A tension sensor 14 is installed on the lower side of the lifting plate 13, and a clamp assembly is installed on the lower side of the tension sensor 14 and the upper side of the machine base 11 respectively.

[0020] During the test, the staff placed the steel pipe vertically, with the upper and lower ends of the steel pipe being clamped by the two clamping assemblies respectively. Then, the lifting control mechanism controlled the lifting plate 13 to move upward. At this time, the tension sensor 14 can sense the tension on the steel pipe and display the data on the display after data processing, or transmit the signal through the communication line. This is the conventional testing method in the prior art, and will not be described in detail here.

[0021] like Figure 2 and Figure 3 As shown, the clamp assembly includes a mounting base 21, on which two opposing sliding plates 22 are slidably connected. Each sliding plate 22 contains an outer clamping plate 24, and the relative position of the two sliding plates 22 is adjusted by a locking device. An inner support column 23 is also installed in the mounting base 21 between the two sliding plates 22. When clamping a steel pipe, the clamping plate 24 is clamped to the outer wall of the steel pipe, while the inner support column 23 is inserted into the steel pipe, achieving bidirectional locking.

[0022] Specifically, the locking component includes an adjusting shaft 25 that passes through a through hole in the left clamping plate 24. A limiting ring 26 that abuts against the left sliding plate 22 is provided on the curved surface of the adjusting shaft 25. The adjusting shaft 25 extends laterally and is threadedly connected to the right sliding plate 22. A handle 27 is provided through the adjusting shaft 25, and the handle 27 is located on the left side of the limiting ring 26.

[0023] When locking is performed, the operator rotates the handle 27 and drives the adjusting shaft 25 to rotate, thereby bringing the slide plates 22 closer together, so that the clamping plate 24 can clamp the steel pipe.

[0024] In addition, the locking components are provided in two sets distributed on the front and rear sides of the clamping plate 24 to ensure the clamping effect, and the two grips 27 in one clamping head assembly are misaligned to avoid interference during rotation.

[0025] In addition, in a second embodiment of the steel pipe strength testing machine, in order to make the inner wall of the steel pipe more tightly clamped, the upper end of the inner support column 23 is integrally formed with multiple outwardly expanding arc panels 31. The outwardly expanding arc panels 31 are set at equal angles with the axis of the inner support column 23 as the center, and a gap is provided between each of the outwardly expanding arc panels 31. The upper end surface of the outwardly expanding arc panel 31 and its inner curved surface near the axis of the inner support column 23 are chamfered to form an oblique concave surface. It also includes an inverted cone column 32. The cone surface inside the inverted cone column 32 is attached to the oblique concave surface inside each of the outwardly expanding arc panels 31. It also includes an inner support control device for controlling the up and down position of the inverted cone column 32, thereby controlling the outward expansion of the outward deformation of the outwardly expanding arc panels 31.

[0026] In this embodiment, the internal support control device includes a control groove 41 disposed in the mounting base 21. A controlled rod 42 is integrally formed on the end face of the inverted conical column 32, extending through the control groove 41. An inclined block 43 is fixedly provided at the end of the controlled rod 42. A translation block 44 that can abut against the inclined surface inside the inclined block 43 is slidably connected to the control groove 41. A control shaft 45 is also rotatably connected to the mounting base 21. The control shaft 45 is horizontally placed and threadedly connected to the translation block 44. A screw cap is installed at the end of the control shaft 45 extending outside the mounting base 21. The inclined block 43 is slidably connected to the control groove 41, while the translation block 44 is slidably connected to the control groove 41.

[0027] In this embodiment, when clamping the steel pipe, the worker places one end of the steel pipe over the inner support column 23 and the outer expansion arc panel 31. Then, the worker rotates the rotating cap to drive the control shaft 45 to rotate, thereby causing the translation block 44 to move laterally. During this process, the translation block 44 drives the inclined block 43, the controlled rod 42, and the inverted cone column 32 to move vertically through the inclined surface, and causes the inverted cone column 32 to support the outer expansion arc panel 31. At this time, the outer expansion arc panel 31 undergoes slight deformation and presses against the inner wall of the steel pipe. Then, the worker rotates the gripping rod 27 and causes the clamping plate 24 to clamp the outer wall of the steel pipe, thus completing the clamping of the steel pipe.

[0028] The lifting control mechanism includes a slide groove located within the support arm 12. A threaded shaft 51, vertically arranged and threadedly connected to the support arm 12, is rotatably connected within the slide groove. The threaded shafts 51 in both support arms 12 are threadedly connected to the lifting plate 13. The machine base 11 is equipped with a motor for driving the threaded shafts 51 to rotate. The operator can control the lifting plate 13 and the upper clamp assembly to move up and down through the motor, thereby realizing clamping and testing work.

[0029] It should be noted that protective covers (not shown in the figure) can be provided on the upper and lower sides of the lifting plate 13 to improve the service life of the threaded shaft 51 and reduce the maintenance frequency. The clamp assembly can be completely replaced with different sizes to fit steel pipes of different specifications; The motor can be provided in two parts, which are respectively connected to the two threaded shafts 51. The control method of the two motors driving the two threaded shafts to rotate synchronously is a conventional setting in the prior art, and will not be described in detail here. like Figure 2 As shown, the clamping plate 24 can also be slidably installed in the slide plate 22 and is limited by the adjusting shaft 25 to prevent it from falling off. When the adjusting shaft 25 is unscrewed, it is convenient to replace the clamping plate 24 of different specifications.

[0030] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A steel pipe strength testing machine, comprising a machine base (11), characterized in that: The machine base (11) is provided with two support arms (12) distributed on the left and right, and a lifting plate (13) is connected between the two support arms (12). It also includes a lifting control mechanism for controlling the lifting plate (13) to lift. A tension sensor (14) is installed on the lower side of the lifting plate (13), and a clamp assembly is installed on the lower side of the tension sensor (14) and the upper side of the machine base (11). The clamp assembly includes a mounting base (21), on which two opposing sliding plates (22) are slidably connected. The sliding plates (22) are equipped with an outer clamping plate (24), and the relative position relationship between the two sliding plates (22) is adjusted by a locking member. An inner support column (23) is also installed in the mounting base (21) between the two sliding plates (22).

2. The steel pipe strength testing machine according to claim 1, characterized in that: The locking component includes an adjusting shaft (25) that passes through the through hole in the left clamp (24). A limiting ring (26) that abuts against the left sliding plate (22) is provided on the curved surface of the adjusting shaft (25). The adjusting shaft (25) extends laterally and is threadedly connected to the right sliding plate (22). A handle (27) is provided through the adjusting shaft (25), and the handle (27) is located to the left of the limiting ring (26).

3. The steel pipe strength testing machine according to claim 2, characterized in that: The locking components are provided in two sets distributed on the front and rear sides of the clamp plate (24), and the two grips (27) in the same clamp assembly are misaligned.

4. The steel pipe strength testing machine according to claim 1, characterized in that: The upper end of the inner support column (23) is integrally formed with multiple outwardly expanding arc panels (31). The outwardly expanding arc panels (31) are set at equal angles with the axis of the inner support column (23) as the center, and there is a gap between each outwardly expanding arc panel (31). The upper end surface of the outwardly expanding arc panel (31) and its inner curved surface near the axis of the inner support column (23) are chamfered to form an oblique concave surface. It also includes an inverted cone column (32). The cone surface inside the inverted cone column (32) is attached to the oblique concave surface inside each outwardly expanding arc panel (31). It also includes an inner support control device for controlling the up and down position of the inverted cone column (32) and thus controlling the outward expansion of the outwardly expanding arc panel (31).

5. A steel pipe strength testing machine according to claim 4, characterized in that: The internal support control device includes a control groove (41) located in the mounting base (21). A controlled rod (42) is integrally formed on the end face of the inverted cone column (32) and extends into the control groove (41). An inclined block (43) is fixedly provided at the end of the controlled rod (42). A translation block (44) that can abut against the inclined surface inside the inclined block (43) is slidably connected in the control groove (41). A control shaft (45) is also rotatably connected in the mounting base (21). The control shaft (45) is horizontally placed and threadedly connected to the translation block (44).

6. A steel pipe strength testing machine according to claim 5, characterized in that: The control shaft (45) is fitted with a swivel cap at its end extending outside the mounting base (21).

7. A steel pipe strength testing machine according to claim 1, characterized in that: The lifting control mechanism includes a slide groove located in the support arm (12), and a threaded shaft (51) is rotatably connected in the slide groove and threadedly connected in the support arm (12). The threaded shafts (51) in the two support arms (12) are threadedly connected to the lifting plate (13), and the machine base (11) is provided with a motor for driving the threaded shaft (51) to rotate.

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