Annular concrete pole mechanical property testing device

Abstract

The invention belongs to the technical field of electric pole detection, and particularly relates to an annular concrete electric pole mechanical property testing device which comprises a frame body and a testing component, the frame body comprises a plurality of sections of supports spliced through splicing locking components, and the testing component comprises an external force loading piece connected to the frame body and used for applying loads to an electric pole to be tested. The frame body is provided with a fixed pulley, and the external force loading member is connected with a steel cable which is connected with a to-be-tested electric pole through the fixed pulley. The support comprises a horizontal support and a plurality of sections of inclined supports, a sliding seat is arranged at the bottom of the fixed pulley, a sliding way in sliding fit with the sliding seat in the inclination direction of the inclined support is arranged at the top of each inclined support, the sliding ways on any two adjacent inclined supports are communicated, and a locking mechanism is arranged between each sliding seat and the corresponding sliding way. According to the invention, the mechanical property detection of electric poles with different lengths in a larger range can be realized, and the universality is good.

Description

Technical Field

[0001] The invention belongs to the technical field of electric pole detection, and in particular relates to a mechanical property testing device for an annular concrete electric pole. Background Art

[0002] With the rapid development of social economy, the coverage rate of power grid is getting higher and higher. The laying of cables is usually supported by poles. Concrete poles are poles made of concrete and steel bars or steel wires. Annular concrete poles are composed of sand, stone, cement, steel, etc. They are cement prefabricated components commonly used in power overhead lines, communication lines and lighting lines. According to the standard GB4623-2014 annular concrete poles, mechanical properties tests should be carried out on samples of annular concrete poles to ensure that the quality of this batch of products meets the standard requirements.

[0003] At present, the common mechanical property test of annular concrete poles uses two fixed prefabricated reinforced concrete pedestals for testing. The reinforced concrete pedestals are cast at the test site according to the pole test parameters, and the root of the pole is placed between the two reinforced concrete pedestals for limiting the position. Then, a clamp connected to the wire rope is installed near the top of the pole. The wire rope is connected to a tension hoist. The two reinforced concrete pedestals are used as support points, and the load is applied to the pole through the tension hoist.

[0004] The above method has certain limitations. This is because the reinforced concrete pedestal is usually cast at the testing site. When the testing site and the pole are not in the same location, the pole to be tested can only be transported to the reinforced concrete pedestal. The length of the pole varies from 6 to 18 meters, which makes transportation difficult and there are high safety risks during the transportation process. The timeliness of the test cannot be guaranteed.

[0005] To solve the above problems, a Chinese patent with authorization announcement number CN220650273U discloses a movable cantilever annular concrete pole mechanical properties test frame, which includes a frame, a test component and an assembly locking component. The frame is assembled from multiple sections of equal-length brackets, the top of the frame is connected to a column, the column is connected to an inclined steel cable, both ends of the inclined steel cable are respectively connected to the two ends of the frame, the test component includes an electric hoist placed on the outside of the column and a displacement sensor placed at the front end of the pole to be tested, the electric hoist is connected to a steel cable, the steel cable is connected to the pole to be tested via a fixed pulley, a tension sensor for real-time monitoring of the tension of the steel cable is connected in series between the electric hoist and the steel cable, multiple groups of fixed pulleys are arranged, and the multiple groups of fixed pulleys are linearly and equidistantly connected to the frame. The above-disclosed movable cantilever annular concrete pole mechanical property test frame adopts an assembleable frame, which can be assembled and used anytime and anywhere, and is easy to transport. The test frame can be transported to the stored poles for centralized testing, overcoming the problem of the traditional reinforced concrete pedestal that the timeliness is not easy to guarantee. In addition, although multiple groups of fixed pulleys are set on the test frame, the performance of poles of different lengths can be tested, but the number of fixed pulleys is fixed, and the length of poles that can be matched is also limited. Therefore, it is difficult to conduct mechanical property tests on poles of more different lengths. Summary of the invention

[0006] The purpose of the present invention is to provide a ring-shaped concrete pole mechanical property test device to solve the technical problem that the length of the pole that can be tested by the existing ring-shaped concrete pole mechanical property test frame is limited.

[0007] In order to solve the above problems, the annular concrete pole mechanical properties test device provided by the present invention adopts the following technical solutions: The invention discloses a mechanical property test device for an annular concrete pole, comprising a frame and a test component, wherein the frame comprises a plurality of brackets connected by assembled locking components, the test component comprises an external force loading member connected to the frame for applying a load to the pole to be tested, the frame is provided with a fixed pulley, the external force loading member is connected with a steel cable, and the steel cable is connected to the pole to be tested through the fixed pulley; the bracket comprises a horizontal bracket and a plurality of inclined brackets, a slide seat is provided at the bottom of the fixed pulley, and a slideway is provided at the top of each inclined bracket for slidingly cooperating with the slide seat in the inclined direction of the inclined bracket, the slideways on any two adjacent inclined brackets are connected, and a locking mechanism is provided between the slide seat and the slideway.

[0008] Furthermore, the inclined bracket is provided with two support beams arranged in parallel and at intervals, and the space between the two support beams forms the slide; the bottom of the slide seat is provided with a sliding column adapted to the slide, and the end of the inclined bracket is provided with an avoidance gap for avoiding the sliding column so that it can pass through any two adjacent inclined brackets.

[0009] Furthermore, the locking mechanism includes a plurality of locking holes arranged at intervals on each support beam, a locking plate connected to both sides of the slide seat, a locking bolt threadedly connected to the locking plate, and a locking nut threadedly connected to the locking bolt, the position of the locking bolt on the locking plate corresponds to the position of the locking hole on the support beam, and the locking nut is located on the side of the support beam facing away from the slide seat.

[0010] Furthermore, the horizontal bracket is provided with two groups of pole limiting assemblies arranged at intervals in the length direction of the horizontal bracket on the side facing away from the external force loading part, each group of pole limiting assemblies includes a first clamping plate and a second clamping plate arranged at intervals in the width direction of the horizontal bracket, the first clamping plate and the second clamping plate are provided with arc-shaped clamping grooves which are arranged relatively to each other and adapted to the shape of the pole to be tested, the first clamping plate is connected to the horizontal bracket, a first ear plate is connected to the side of the horizontal bracket facing away from the first clamping plate, a second ear plate corresponding to the first ear plate is provided at the end of the second clamping plate away from the horizontal bracket, and the first ear plate and the second ear plate are connected by a fastening assembly.

[0011] Furthermore, the first clamping plate is plug-connected to the horizontal bracket.

[0012] Furthermore, the distance between the first clamping plate and the second clamping plate is adjustable.

[0013] Preferably, a telescopic rod is connected between the first clamping plate and the second clamping plate.

[0014] Furthermore, a leveling frame is provided at the bottom of the horizontal bracket and each inclined bracket, and the leveling frame includes a support plate with adjustable height and used to support the horizontal bracket or the inclined bracket.

[0015] Furthermore, the leveling frame also includes two spaced-apart bases for being placed on the ground, each base is connected to two spaced-apart adjusting screws, the support plate guide passes through each adjusting screw, and the upper and lower sides of the adjusting screws on the support plate are respectively connected to adjusting nuts.

[0016] Furthermore, a column is connected to the inclined bracket spliced ​​with the horizontal bracket, and oblique tie bars and basket screws for adjusting the tightness of the oblique tie bars are detachably connected between the column and the horizontal bracket, and between the column and the inclined bracket at the end, and the external force loading member is relatively fixed to the column.

[0017] The beneficial effects of the present invention are: 1. The fixed pulley in the present invention can slide relative to the inclined bracket through the sliding seat at its bottom, so as to adjust the installation position of the fixed pulley. Since a steel cable for connecting the electric pole is wound around the fixed pulley, when the position of the fixed pulley is adjusted, the position of the steel cable connected to the electric pole can be adjusted, so as to adapt to electric poles of different lengths. Since the fixed pulley adopts a sliding form, compared with the prior art that adopts multiple groups of fixed fixed pulleys, the fixed pulley of the present invention has a larger range of movement, a larger range of applicable electric pole lengths, and better versatility.

[0018] 2. The present invention can limit the position of electric poles with different diameters by adjusting the distance between the first clamping plate and the second clamping plate.

[0019] 3. In the case of an uneven ground, the present invention can adjust the support height of the support plate to ensure that the horizontal bracket and the inclined bracket are at the same level, thereby ensuring the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 It is a schematic diagram of the use of the annular concrete pole mechanical properties testing device of the present invention; Figure 2 It is a schematic diagram of the assembly between the fixed pulley and the inclined bracket; Figure 3 It is a structural schematic diagram of the pole limiting assembly; Figure 4 It is a schematic diagram of the assembly of the pole limit assembly and the horizontal bracket; Figure 5 It is a structural schematic diagram of the leveling frame.

[0021] Description of reference numerals: 1. Horizontal bracket; 2. Inclined bracket; 3. External force loading part; 4. Displacement sensor; 5. Tension sensor; 6. Fixed pulley; 7. Steel cable; 8. Pole to be tested; 9. Column; 10. Oblique tie rod; 11. Slide seat; 12. Slideway; 13. Sliding column; 14. Locking hole; 15. Support beam; 16. Avoidance gap; 17. Locking plate; 18. First clamping plate; 19. Second clamping plate; 20. Inserting column; 21. Fastening screw; 22. Fastening nut; 23. Telescopic rod; 24. Support plate; 25. Base; 26. Adjusting screw; 27. Adjusting nut; 28. Pole limit assembly; 29. ​​First ear plate; 30. Second ear plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0024] Embodiment 1 of the mechanical properties test device for annular concrete poles provided by the present invention: like Figure 1 As shown, the annular concrete pole mechanical property test device includes a frame and a test component. The frame includes multiple sections of brackets spliced ​​by assembling locking components, and the test component includes an external force loading member 3 connected to the frame for applying a load to the pole 8 to be tested, a tension sensor 5 for detecting the external force applied by the external force loading member 3, and a displacement sensor 4 for detecting the displacement of the pole 8 to be tested.

[0025] Specifically, the lengths of the multiple brackets are all equal, and the multiple brackets include one horizontal bracket 1 and the remaining inclined brackets 2. The assembly locking component is a flange, and any two adjacent brackets are connected together by screws installed in the flange. The horizontal bracket 1 and the inclined bracket 2 are both rectangular frame structures. The inclination of the inclined bracket 2 meets the deflection test of the pole.

[0026] like Figure 1 As shown, the horizontal support 1 is provided with two sets of pole limiting components 28 on the side facing away from the external force loading member 3, and the two sets of pole limiting components 28 are arranged at intervals in the length direction of the horizontal support 1. Figure 3 As shown, each set of pole limiting assemblies 28 includes a first clamping plate 18 and a second clamping plate 19 spaced apart in the width direction of the horizontal bracket 1, and an arc-shaped clamping groove adapted to the shape of the pole 8 to be tested is provided on opposite sides of the first clamping plate 18 and the second clamping plate 19.

[0027] like Figure 4As shown, a plug post 20 plugged into the horizontal bracket 1 is provided on the side of the first clamping plate 18 facing away from the second clamping plate 19, a first ear plate 29 is connected to the side of the horizontal bracket 1 facing away from the first clamping plate 18, a second ear plate 30 corresponding to the first ear plate 29 is provided on the end of the second clamping plate 19 away from the horizontal bracket 1, a longer fastening screw 21 is passed through the first ear plate 29 and the corresponding second ear plate 30, and fastening nuts 22 are respectively threadedly connected at both ends of the fastening screw 21 on both sides of the first ear plate 29 and the second ear plate 30. The electric pole 8 to be tested passes through the two arc-shaped clamping grooves, and under the tightening of the fastening nuts 22, the first clamping plate 18 and the second clamping plate 19 clamp the electric pole 8 to be tested.

[0028] In this embodiment, a telescopic rod 23 is further connected between the first clamping plate 18 and the second clamping plate 19, so that the distance between the first clamping plate 18 and the second clamping plate 19 can be adjusted, that is, the spacing between the two arc-shaped clamping grooves is adjustable, and the poles 8 to be tested with different diameters can be inserted between the two arc-shaped clamping grooves. It should be noted that when testing the poles 8 to be tested with different diameters, although the poles 8 to be tested with different diameters and the central part of the arc surface of the arc-shaped clamping groove are in a tangent state, the poles 8 to be tested can still be limited by the tightening of the tightening nut 22.

[0029] like Figure 1 As shown, a column 9 is connected to the inclined bracket 2 spliced ​​with the horizontal bracket 1, and mounting seats are respectively provided on the horizontal bracket 1 and the end inclined bracket 2, and oblique tie bars 10 are respectively connected between the column 9 and the two mounting seats. U-shaped rings are respectively welded on both radial sides of the top of the column 9, wherein the U-shaped ring on one side is connected to the oblique tie bar 10 by a turnbuckle screw, and the mounting seat on this side is directly connected to the oblique tie bar 10; the U-shaped ring on the other side is directly connected to the oblique tie bar 10 on this side, and the mounting seat on this side is connected to the oblique tie bar 10 by a turnbuckle screw. The oblique tie bar 10 can be pre-tightened by the turnbuckle screw to ensure the stability of the frame as a whole.

[0030] In this embodiment, the external force loading member 3 is a tension hoist, which can be an electric hoist or a hand-pulled hoist. One end of the external force loading member 3 is connected to the column 9, and the other end is connected to the tension sensor 5 through the steel cable 7. The other end of the tension sensor 5 is wound around a fixed pulley 6 through the steel cable 7, and the end of the steel cable 7 is used to connect the pole 8 to be tested.

[0031] like Figure 2As shown, the fixed pulley 6 is installed on the inclined bracket 2. In this embodiment, a slide seat 11 is provided at the bottom of the fixed pulley 6, and two support beams 15 are arranged in parallel and spaced apart at the top of each inclined bracket 2. The space between the two support beams 15 forms a slideway 12, and the slideway 12 extends along the inclined direction of the inclined bracket 2. A slide post 13 adapted to the slideway 12 is provided at the bottom of the slide seat 11, and the slide post 13 can slide in the slideway 12. In order to avoid interference of the slide post 13 during the sliding process, an avoidance notch 16 for avoiding the slide post 13 is provided on the inclined bracket 2. When two adjacent inclined brackets 2 are docked together, the slide post 13 can move from the slideway 12 of one inclined bracket 2 to the slideway 12 of the other inclined bracket 2 along the avoidance notch 16, and at this time, the slideways 12 on the two adjacent inclined brackets 2 are connected through the avoidance notch 16.

[0032] A locking mechanism is also provided between the slide 11 and the slideway 12. In this embodiment, the locking mechanism includes a plurality of equally spaced locking holes 14 provided on each support beam 15, a locking plate 17 connected to both sides of the slide 11, a locking bolt threadedly connected to the locking plate 17, and a locking nut threadedly connected to the locking bolt. The position of the locking bolt on the locking plate 17 corresponds to the position of the locking hole 14 on the support beam 15, and the locking nut is located on the side of the support beam 15 facing away from the slide 11. The slide 11 is also provided with a through hole for the steel cable 7 to pass through. Since the steel cable 7 is connected to the pole 8 to be tested after passing around the fixed pulley 6, when the fixed pulley 6 is adjusted to different positions on the inclined bracket 2, the poles 8 to be tested of different lengths can be tested.

[0033] During the actual test, the horizontal bracket 1 and each inclined bracket 2 are placed on the ground. Since there are uneven parts on the ground, a leveling bracket is uniformly set at the bottom of the horizontal bracket 1 and each inclined bracket 2. Figure 5 As shown, the leveling frame includes two bases 25 arranged at intervals for being placed on the ground, two adjusting screws 26 connected to each base 25 and arranged at intervals, and a support plate 24 passing through the four adjusting screws 26, and the upper and lower sides of the adjusting screws 26 are respectively connected with adjusting nuts 27. When the ground is uneven and the supporting heights of the supporting plates 24 are inconsistent, the adjusting nuts 27 can be loosened to adjust the supporting heights of the supporting plates 24, so that the horizontal bracket 1 and the tilting brackets 2 are finally at the same height to ensure the accuracy of the detection.

[0034] The working principle of the mechanical properties test device of the annular concrete pole 8 of the present invention is: Pass the pole 8 to be tested through the arc-shaped grooves of the first clamping plate 18 and the second clamping plate 19, and then tighten the fastening nut 22 to make the first clamping plate 18 and the second clamping plate 19 clamp the root of the pole 8 to be tested; put the steel cable 7 on the pole 8 to be tested (25 cm away from the tip end), apply load force to the pole 8 to be tested through the tension hoist, the pole 8 to be tested will be displaced, the tension sensor 5 and the displacement sensor 4 will display the force value and the displacement value respectively, and the deflection of the pole 8 to be tested is calculated by the displacement value and the force value, and then it is judged whether the pole 8 to be tested is qualified.

[0035] When testing poles 8 of different lengths, loosen the locking nut, slide the slide 11 to adjust the position of the fixed pulley 6, and when the fixed pulley 6 is adjusted to a position that matches the length of the pole 8 to be tested, tighten the locking nut, and then put the steel cable 7 on the pole 8 to be tested, and repeat the above operation. Figure 1 As shown, when the fixed pulley 6 moves to four different positions respectively, a 10-meter-long pole, a 12-meter-long pole, a 15-meter-long pole and an 18-meter-long pole can be detected respectively.

[0036] The present invention can detect electric poles 8 of different lengths, and compared with the prior art using multiple fixed pulleys 6, the fixed pulley 6 of the present invention has a larger range of motion, a larger range of applicable electric poles 8 lengths, and higher versatility. In addition, the horizontal bracket 1 and the inclined bracket 2 can be disassembled, the electric pole limit assembly 28 and the horizontal bracket 1 can be disassembled, and the fixed pulley 6 can also be disassembled, so the whole is easy to transport and assemble, and is not limited by the test site.

[0037] Embodiment 2 of the mechanical properties test device for annular concrete poles provided by the present invention: The main difference between it and Example 1 is: In embodiment 1, the distance between the first clamping plate and the second clamping plate is adjustable.

[0038] In this embodiment, the distance between the first clamping plate and the second clamping plate is fixed, and the entire test device only tests poles with a specific diameter.

[0039] In the description of the present specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ring-shaped concrete pole mechanical property test device, comprising a frame and a test component, wherein the frame comprises a plurality of brackets spliced ​​by assembling locking components, the test component comprises an external force loading member connected to the frame for applying a load to the pole to be tested, a fixed pulley is provided on the frame, a steel cable is connected to the external force loading member, and the steel cable is connected to the pole to be tested through the fixed pulley; characterized in that: The bracket includes a horizontal bracket and a multi-section inclined bracket. A slide seat is provided at the bottom of the fixed pulley, and a slideway is provided at the top of each inclined bracket, which slides with the slide seat in the inclined direction of the inclined bracket. The slideways on any two adjacent inclined brackets are connected, and a locking mechanism is provided between the slide seat and the slideway.

2. The annular concrete pole mechanical properties testing device according to claim 1 is characterized in that: The inclined bracket is provided with two support beams arranged in parallel and at intervals, and the space between the two support beams forms the slideway; the bottom of the slide seat is provided with a sliding column adapted to the slideway, and the end of the inclined bracket is provided with an avoidance gap for avoiding the sliding column so that it can pass through any two adjacent inclined brackets.

3. The annular concrete pole mechanical properties testing device according to claim 2 is characterized in that: The locking mechanism includes a plurality of locking holes arranged at intervals on each support beam, a locking plate connected to both sides of the slide seat, a locking bolt threadedly connected to the locking plate, and a locking nut threadedly connected to the locking bolt. The position of the locking bolt on the locking plate corresponds to the position of the locking hole on the support beam, and the locking nut is located on the side of the support beam facing away from the slide seat.

4. The annular concrete pole mechanical properties testing device according to any one of claims 1 to 3, characterized in that: The horizontal bracket is provided with two groups of pole limiting assemblies arranged at intervals in the length direction of the horizontal bracket on the side facing away from the external force loading part, each group of pole limiting assemblies includes a first clamping plate and a second clamping plate arranged at intervals in the width direction of the horizontal bracket, the first clamping plate and the second clamping plate are provided with arc-shaped clamping grooves which are arranged relatively to each other and adapted to the shape of the pole to be tested, the first clamping plate is connected to the horizontal bracket, the side of the horizontal bracket facing away from the first clamping plate is connected with a first ear plate, the end of the second clamping plate away from the horizontal bracket is provided with a second ear plate which corresponds to the first ear plate one by one, and the first ear plate and the second ear plate are connected by a fastening assembly.

5. The annular concrete pole mechanical properties testing device according to claim 4 is characterized in that: The first clamping plate is plug-connected to the horizontal bracket.

6. The annular concrete pole mechanical properties testing device according to claim 4 is characterized in that: The distance between the first clamping plate and the second clamping plate is adjustable.

7. The annular concrete pole mechanical properties testing device according to claim 6 is characterized in that: A telescopic rod is connected between the first clamping plate and the second clamping plate.

8. The annular concrete pole mechanical properties testing device according to any one of claims 1 to 3, characterized in that: A leveling frame is provided at the bottom of the horizontal support and each inclined support. The leveling frame comprises a support plate with adjustable height and used for supporting the horizontal support or the inclined support.

9. The annular concrete pole mechanical properties testing device according to claim 8 is characterized in that: The leveling frame also includes two spaced-apart bases for being placed on the ground, each base is connected to two spaced-apart adjusting screws, the support plate guide passes through each adjusting screw, and the upper and lower sides of the adjusting screws located on the support plate are respectively connected to adjusting nuts.

10. The annular concrete pole mechanical properties testing device according to any one of claims 1 to 3, characterized in that: The inclined bracket spliced ​​with the horizontal bracket is connected with a column, and oblique tie bars and basket screws for adjusting the tightness of the oblique tie bars are detachably connected between the column and the horizontal bracket, and between the column and the end inclined bracket, and the external force loading member is relatively fixed to the column.

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