Clamping device for tension test of cement pole

Abstract

The utility model relates to cement pole test technical field discloses a kind of clamping devices for cement pole tension test, including positioning column, the middle part of the one end of positioning column is passed through and is equipped with fixed slot, the opening end of fixed slot is fixedly installed with annular fixed sleeve, the outside of fixed sleeve is passed through and is screw-connected with screw rod. The utility model is threaded connection screw rod outside annular fixed sleeve of fixed slot opening end, when rotating screw rod, screw rod is pushed inside fixed sleeve along thread direction, and the fixed block of end portion is synchronously moved, and the preliminary clamping positioning is realized by the abutting of fixed block and cement pole surface. Meanwhile, positioning column can be driven to rotate to vertical state by driving mechanism, meet the attitude requirement of tension test, while, fixed mechanism can automatically reinforce cement pole secondarily, further improve clamping stability, avoid pole loosening in test process.

Description

Technical Field

[0001] This utility model relates to the field of cement pole testing technology, specifically a clamping device for tensile testing of cement poles. Background Technology

[0002] As a core load-bearing component in the construction of infrastructure such as power transmission and communication networks, the mechanical properties of cement poles directly affect the safety and stability of power grid erection and line operation. During actual service, cement poles must withstand complex stresses such as wind loads, cable tension, and self-weight bending moments over extended periods. Therefore, rigorous tensile tests must be conducted before they leave the factory to test their pull-out and bending resistance, which is a crucial step in ensuring project quality.

[0003] The inventors discovered that the existing technology suffers from at least the following unresolved problems: Cement poles are characterized by their large length and weight, requiring them to be initially clamped horizontally during testing before being adjusted to a vertical position to simulate their actual service posture. Current devices largely rely on manual labor using cranes, jacks, and other auxiliary equipment for posture conversion, which is not only costly in terms of manpower and resources but also difficult to achieve precise positioning, often resulting in pole tilting and center of gravity shift. This not only affects testing efficiency but may also lead to inconsistencies between the tested stress distribution and actual operating conditions due to posture deviations, further reducing the reliability of the test data.

[0004] Traditional clamping devices are insufficient to offset the decrease in clamping force caused by deformation through initial clamping. As the test continues, gaps are likely to appear between the pole and the clamping device, leading to a gradual decrease in clamping force and affecting the stability of the test.

[0005] Therefore, we propose a clamping device for tensile testing of cement poles, which can solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a clamping device for tensile testing of cement poles, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a clamping device for tensile testing of cement poles, comprising a positioning column, a fixing groove extending through the middle of one end of the positioning column, an annular fixing sleeve fixedly installed at the open end of the fixing groove, a screw threaded through and connected to the outer side of the fixing sleeve, and a fixing block fixedly installed at one end of the screw placed inside the fixing sleeve; it also includes a driving mechanism for driving the positioning column to rotate to a vertical state, and a fixing mechanism for secondary fixing of the cement pole.

[0008] As an optional solution to the technical solution of this application, the driving mechanism includes a fixed frame and a servo motor for driving the positioning column to rotate. The positioning column has symmetrically installed driving rods on its front and rear sides at the end away from the fixed sleeve. The driving rods on the front and rear sides of the positioning column are rotatably connected to the inner walls of the fixed frame on both sides through bearings. The shaft end of the servo motor is fixedly connected to the end of the driving rod away from the positioning column. The servo motor is fixedly connected to the outside of the fixed frame.

[0009] As an optional solution to the technical solution of this application, the upper ends of the front and rear sides of the fixing frame are provided with first fixing holes, and the front and rear sides of the positioning column are symmetrically provided with second fixing holes. The first fixing holes and the second fixing holes correspond to each other, and the positioning column and the fixing frame are fixedly connected by bolts through the first fixing holes and the second fixing holes.

[0010] As an optional solution to the technical solution of this application, the fixing mechanism includes two sets of fixing bars for fixing cement poles and an adjusting bar for driving the two sets of fixing bars to move relative to each other. Limiting grooves are symmetrically opened in the middle of the inner wall of the top and bottom of the fixing groove. The two sets of fixing bars are slidably connected to the two sets of limiting grooves respectively. A first wedge block is fixedly installed in the middle of the side of the fixing bar away from the fixing groove. A sliding groove is opened in the side of the fixing groove away from the opening end. A sliding strip is slidably connected inside the sliding groove. Connecting rods are horizontally fixedly installed at both the upper and lower ends of the sliding strip near the fixing groove. A second wedge block is fixedly installed at the end of the connecting rod away from the sliding strip through the limiting groove. The second wedge block is slidably connected to the first wedge block. One end of the adjusting bar is fixedly connected to the middle of the side of the sliding strip away from the fixing groove.

[0011] As an optional solution to the technical solution of this application, an adjustment groove is provided through the inner wall of the slide groove on the side away from the fixed groove, the adjustment bar is slidably connected to the adjustment groove, and the end of the adjustment bar away from the slide bar is movably connected to the bottom inner wall of the fixed frame.

[0012] As an optional solution to the technical solution of this application, two sets of first springs are provided on the side of the slider away from the adjusting bar, and the two sets of first springs are respectively sleeved on the outside of the two sets of connecting rods. Second springs are provided at both ends of the fixed bar away from the first wedge block, and the size of the fixed bar matches the size of the limiting groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: A screw is threadedly connected to the outer side of the annular fixing sleeve at the opening end of the fixing slot. When the screw is rotated, it advances towards the inside of the fixing sleeve along the thread direction, causing the fixing block at the end to move synchronously. Initial clamping and positioning are achieved by the fixing block abutting against the surface of the cement pole. Simultaneously, the driving mechanism can drive the positioning column to rotate to a vertical position, meeting the posture requirements of the tensile test. At the same time, the fixing mechanism can automatically perform secondary reinforcement of the cement pole, further improving clamping stability and preventing the pole from loosening during the test. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a front view of a clamping device for tensile testing of cement poles according to the present invention; Figure 2 This is a cross-sectional view of the positioning column of a clamping device for tensile testing of cement poles according to this utility model; Figure 3 This is a schematic diagram of the horizontal position of the positioning column of the clamping device for tensile testing of cement poles according to this utility model; Figure 4 This is a schematic diagram of the vertical position of the positioning column of the clamping device for tensile testing of cement poles according to this utility model.

[0015] In the diagram: 1. Positioning pin; 11. Fixing groove; 12. Fixing sleeve; 13. Screw; 14. Fixing block; 2. Fixing frame; 21. Drive rod; 22. Servo motor; 23. First fixing hole; 24. Second fixing hole; 25. Bolt; 3. Limiting groove; 31. Fixing strip; 32. First wedge block; 33. Slide groove; 34. Slide bar; 35. Connecting rod; 36. Second wedge block; 37. Adjusting strip; 38. Adjusting groove; 4. First spring; 41. Second spring. Detailed Implementation

[0016] Please see Figures 1-4 This utility model provides a technical solution: a clamping device for tensile testing of cement poles, including a positioning column 1, a fixing groove 11 extending through the middle of one end of the positioning column 1, an annular fixing sleeve 12 fixedly installed at the open end of the fixing groove 11, a screw 13 extending through and threadedly connected to the outer side of the fixing sleeve 12, and a fixing block 14 fixedly installed at one end of the screw 13 placed inside the fixing sleeve 12; it also includes a driving mechanism for driving the positioning column 1 to rotate to a vertical state, and a fixing mechanism for secondary fixing of the cement pole.

[0017] In this technical solution, a screw 13 is threadedly connected to the outer side of the annular fixing sleeve 12 at the opening end of the fixing groove 11. When the screw 13 is rotated, it pushes inward along the thread direction towards the fixing sleeve 12, causing the fixing block 14 at the end to move synchronously. The initial clamping and positioning are achieved by the fixing block 14 abutting against the surface of the cement pole. At the same time, the driving mechanism can drive the positioning column 1 to rotate to a vertical position to meet the posture requirements of the tensile test. Meanwhile, the fixing mechanism can automatically perform secondary reinforcement on the cement pole to further improve the clamping stability and prevent the pole from loosening during the test.

[0018] In this embodiment, the driving mechanism includes a fixed frame 2 and a servo motor 22 for driving the positioning column 1 to rotate. Driving rods 21 are symmetrically mounted on the front and rear sides of the end of the positioning column 1 away from the fixed sleeve 12. The driving rods 21 on the front and rear sides of the positioning column 1 are rotatably connected to the inner walls of both sides of the fixed frame 2 via bearings. The shaft end of the servo motor 22 is fixedly connected to the end of the driving rod 21 away from the positioning column 1, and the servo motor 22 is fixedly connected to the outside of the fixed frame 2.

[0019] In this technical solution, the drive mechanism provides a support base for the whole through the fixed frame 2. When the servo motor 22 is started, the output torque is transmitted to the positioning column 1 through the drive rod 21, which drives the positioning column 1 to rotate around the drive rod 21 as the rotation axis, thereby realizing the precise switching between the positioning column 1 in a horizontal position (to facilitate the insertion of the electric pole) and a vertical position (to meet the test posture).

[0020] In this embodiment, the upper ends of the front and rear sides of the fixing frame 2 are provided with first fixing holes 23, and the front and rear sides of the positioning column 1 are symmetrically provided with second fixing holes 24. The first fixing holes 23 and the second fixing holes 24 correspond to each other, and the positioning column 1 and the fixing frame 2 are fixedly connected by bolts 25 through the first fixing holes 23 and the second fixing holes 24.

[0021] In this technical solution, after the drive mechanism adjusts the positioning column 1 to the target posture (such as vertical state), the bolt 25 passes through the aligned first fixing hole 23 and second fixing hole 24. Through the threaded engagement or fastening action of the bolt 25 with the hole, the positioning column 1 is rigidly connected to the fixing frame 2, which effectively restricts the rotation or displacement of the positioning column 1 during the test and ensures the stability of the test.

[0022] In this embodiment, the fixing mechanism includes two sets of fixing bars 31 for fixing cement poles, and an adjusting bar 37 for driving the two sets of fixing bars 31 to move relative to each other. Limiting grooves 3 are symmetrically opened in the middle of the inner wall of the top and bottom ends of the fixing groove 11. The two sets of fixing bars 31 are slidably connected to the two sets of limiting grooves 3 respectively. A first wedge block 32 is fixedly installed in the middle of the side of the fixing bar 31 away from the fixing groove 11. A sliding groove 33 is opened in the side of the fixing groove 11 away from the opening end. A sliding strip 34 is slidably connected inside the sliding groove 33. A connecting rod 35 is horizontally fixedly installed at both the upper and lower ends of the sliding strip 34 near the fixing groove 11. A second wedge block 36 is fixedly installed at the end of the connecting rod 35 away from the sliding strip 34 through the limiting groove 3. The second wedge block 36 is slidably connected to the first wedge block 32. One end of the adjusting bar 37 is fixedly connected to the middle of the side of the sliding strip 34 away from the fixing groove 11.

[0023] In this technical solution, when the adjusting bar 37 drives the sliding bar 34 to move along the sliding groove 33, the connecting rod 35 pushes the second wedge block 36 to move synchronously. Through the interaction of the inclined surfaces of the wedge block, the two sets of fixing bars 31 are driven to move relative to each other along the limiting groove 3 towards the pole, thus achieving secondary clamping of the pole and improving clamping reliability.

[0024] In this embodiment, an adjustment groove 38 is provided through the inner wall of the slide groove 33 on the side away from the fixed groove 11. The adjustment bar 37 is slidably connected to the adjustment groove 38, and the end of the adjustment bar 37 away from the slide bar 34 is movably connected to the bottom inner wall of the fixed frame 2.

[0025] In this technical solution, when the positioning column 1 drives the cement pole inside the fixing groove 11 to rotate to a vertical position, the end of the adjusting strip 37 away from the slide bar 34 contacts the bottom inner wall of the fixing frame 2. Through the sliding cooperation between the adjusting strip 37 and the adjusting groove 38, the adjusting strip 37 can slide along the adjusting groove 38 as the posture of the positioning column 1 changes. Furthermore, the adjusting strip 37 can effectively drive the slide bar 34 to move, ensuring the normal operation of the fixing mechanism.

[0026] In this embodiment, two sets of first springs 4 are provided on the side of the slide bar 34 away from the adjusting bar 37. The two sets of first springs 4 are respectively sleeved on the outside of the two sets of connecting rods 35. The two ends of the fixing bar 31 away from the first wedge block 32 are provided with second springs 41, and the size of the fixing bar 31 matches the size of the limiting groove 3.

[0027] In this technical solution, when the positioning column 1 rotates to a horizontal position, the adjusting bar 37 loses the pressure of the fixing frame 2 and is elastically reset by the first spring 4, pushing the slide bar 34 to move in the opposite direction, which in turn drives the second wedge block 36 back to its initial position. After the fixing bar 31 loses the thrust of the second wedge block 36, the second springs 41 at both ends of the side away from the first wedge block 32 are elastically reset by the second spring, pushing the fixing bar 31 to move along the limiting groove 3 away from the pole, automatically releasing the clamping of the pole, making it convenient for staff to remove the pole after testing.

[0028] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A clamping device for tensile testing of cement poles, comprising a positioning column (1), characterized in that, A fixing groove (11) is provided through the middle of one end of the positioning column (1). An annular fixing sleeve (12) is fixedly installed at the open end of the fixing groove (11). A screw (13) is threaded through and connected to the outside of the fixing sleeve (12). A fixing block (14) is fixedly installed at one end of the screw (13) placed inside the fixing sleeve (12). The system also includes a driving mechanism for driving the positioning column (1) to rotate to a vertical position, and a fixing mechanism for secondary fixing of the cement pole.

2. The clamping device for tensile testing of cement poles according to claim 1, characterized in that: The driving mechanism includes a fixed frame (2) and a servo motor (22) for driving the positioning column (1) to rotate. The positioning column (1) is symmetrically equipped with driving rods (21) on the front and rear sides of the end away from the fixed sleeve (12). The driving rods (21) on the front and rear sides of the positioning column (1) are rotatably connected to the inner walls on both sides of the fixed frame (2) through bearings. The shaft end of the servo motor (22) is fixedly connected to the end of the driving rod (21) away from the positioning column (1). The servo motor (22) is fixedly connected to the outside of the fixed frame (2).

3. The clamping device for tensile testing of cement poles according to claim 2, characterized in that: The upper ends of the front and rear sides of the fixing frame (2) are provided with first fixing holes (23), and the front and rear sides of the positioning column (1) are provided with second fixing holes (24). The first fixing holes (23) and the second fixing holes (24) correspond to each other, and the positioning column (1) and the fixing frame (2) are fixedly connected by bolts (25) through the first fixing holes (23) and the second fixing holes (24).

4. The clamping device for tensile testing of cement poles according to claim 3, characterized in that: The fixing mechanism includes two sets of fixing bars (31) for fixing the cement pole, and an adjusting bar (37) for driving the two sets of fixing bars (31) to move relative to each other. The fixing groove (11) has symmetrically arranged limiting grooves (3) in the middle of its top and bottom inner walls. The two sets of fixing bars (31) are slidably connected to the two sets of limiting grooves (3). A first wedge block (32) is fixedly installed in the middle of the side of the fixing bar (31) away from the fixing groove (11). A sliding groove is provided on the side of the fixing groove (11) away from the opening end. 33), a slide bar (34) is slidably connected inside the slide groove (33). A connecting rod (35) is horizontally fixed at both the upper and lower ends of the slide bar (34) near the fixed groove (11). The end of the connecting rod (35) away from the slide bar (34) passes through the limiting groove (3) and is fixedly installed with a second wedge block (36). The second wedge block (36) is slidably connected to the first wedge block (32). One end of the adjusting bar (37) is fixedly connected to the middle part of the slide bar (34) away from the fixed groove (11).

5. A clamping device for tensile testing of cement poles according to claim 4, characterized in that: An adjustment groove (38) is provided through the inner wall of the slide groove (33) on the side away from the fixed groove (11). The adjustment bar (37) is slidably connected to the adjustment groove (38). The end of the adjustment bar (37) away from the slide bar (34) is movably connected to the bottom inner wall of the fixed frame (2).

6. A clamping device for tensile testing of cement poles according to claim 5, characterized in that: Two sets of first springs (4) are provided on the side of the slide bar (34) away from the adjusting bar (37). The two sets of first springs (4) are respectively sleeved on the outside of the two sets of connecting rods (35). The two ends of the fixing bar (31) away from the first wedge block (32) are provided with second springs (41), and the size of the fixing bar (31) matches the size of the limiting groove (3).

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