Stress performance testing platform and method for new material cement poles

Abstract

The present invention relates to the field of pole stress testing technology, specifically to a stress performance testing platform and method for new material cement poles, including a test bench for placing cement poles, a fixed pole portion arranged at the rear end of the test bench, and a pressure pole portion arranged at the front end of the test bench; the fixed pole portion includes a large pole sleeve for positioning and sleeved on the large diameter end of the cement pole, a protective cover for covering the top surface of the test bench, and a linkage rod that drives the protective cover to flip and switch up and down on the top of the test bench as the large pole sleeve moves back and forth. The present invention forms a test movement of breaking the cement pole through the fixed pole portion and the pressure pole portion, and then records the data through a pressure gauge; wherein, when the large pole sleeve covers the cement pole, it drives the linkage rod to move forward synchronously and drives the protective cover to flip from the test bench to its top surface and cover the cement pole, so as to prevent unsafe and untidy conditions caused by splashing cement fragments.

Description

Technical Field

[0001] The present invention relates to the technical field of pole stress testing, and in particular to a stress performance testing platform and method for a new material cement pole. Background Art

[0002] New material cement poles are an innovative product in the field of utility pole equipment technology, which mainly improves its performance by using new materials or improving production processes. These new materials include high-performance concrete, composite materials, etc., which give cement poles higher strength, toughness, corrosion resistance and service life.

[0003] Prestressed cement poles are cement poles that are filled and reinforced with prestressed steel bars. Compared to conventional ordinary cement poles, prestressed cement poles have higher strength and stiffness. Testing the performance of prestressed cement poles is a key step in ensuring their safety and reliability in actual use. Physical inspection can be used to evaluate the appearance and structural integrity of prestressed cement poles. Check the poles for obvious cracks, peeling, defects or other physical damage. These damages may affect the load-bearing capacity and service life of the poles.

[0004] Secondly, the tensile test is used to evaluate the actual stress of the prestressed steel bars. By measuring the actual stress level of the prestressed steel bars of the poles, the tensioning effect and stability of the prestressed steel bars can be judged. This helps to ensure that the performance of the steel bars remains stable in long-term use.

[0005] However, when testing the stress of cement poles, the limit data of stress cannot be known until the pole breaks, so this test is accompanied by the unsafety of destruction. When the cement pole breaks, the broken cement fragments will splash, making the test site dangerous and messy, resulting in an increase in the subsequent maintenance and cleaning workload. Summary of the invention

[0006] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a stress performance detection test platform and method for new material cement poles to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, on the one hand, the present invention provides a stress performance detection test platform for new material cement poles, including a test bench for placing cement poles, a fixed pole part arranged at the rear end of the test bench, and a pressure pole part arranged at the front end of the test bench; the fixed pole part includes a large pole sleeve for positioning and sleeved on the large diameter end of the cement pole, a protective cover for covering the top surface of the test bench, and a linkage rod that drives the protective cover to flip and switch up and down on the top of the test bench as the large pole sleeve moves forward and backward; a servo electric cylinder for driving the large pole sleeve to move forward and backward is installed on the top surface of the rear end of the test bench, and the protective cover is provided with a metal mesh and a nylon cloth from the inside to the outside in sequence, and forms a semi-cylindrical shape, and the outer side and both ends of the protective cover are provided with a cover frame, and a cover tube is provided on the central axis of the protective cover, and one side of the cover tube is fixedly connected to the inner side of the cover frame located on the outer side;

[0008] The inner wall of the middle part of the rear end of the shield tube is symmetrically provided with a slide groove extending to the middle section, and the upper and lower inner walls of the middle section of the shield tube are both provided with a spiral groove, the rear end of the spiral groove located at the top is connected with the slide groove located at the left side, and the rear end of the spiral groove located at the bottom is connected with the slide groove located at the right side; the central angle of the spiral groove twisting is 180 degrees; the linkage rod is plugged into the shield tube, and linkage blocks are symmetrically provided on both sides of the front end of the linkage rod, a pair of linkage blocks are correspondingly plugged into the two slide grooves, and are slidably engaged with the upper and lower spiral grooves;

[0009] The pressure rod part includes a small rod sleeve that is sleeved on the small diameter end of the cement pole, a push sleeve part that is slidably engaged with the horizontal right side of the small rod sleeve, a transmission part that is in sliding contact with the horizontal right end of the push sleeve part, and a hydraulic cylinder for driving the transmission part to extend and retract along the front and rear directions of the test bench; the transmission part is a long frame structure and its side facing the push sleeve part is an inclined surface, and has a structure with a narrow front end and a wide rear end. A hydraulic station that provides hydraulic force to the hydraulic cylinder is placed outside the test bench.

[0010] As a further improvement of the present technical solution, a rod groove is provided on the center line of the front-to-rear direction of the top surface of the test bench, an arc groove is provided at the rear end of the rod groove for clamping with the large rod sleeve, the arc surface of the arc groove is lower than the arc surface of the rod groove, and through grooves with cocircular central axes are provided on the top surface of the test bench and on both sides of the rod groove, and the protective cover is rotatably plugged into the through groove.

[0011] As a further improvement of the technical solution, a positioning plate is fixedly connected to the horizontal right side of the large rod sleeve, and a baffle and a pressure plate that are clamped and engaged with the positioning plate inside and outside are provided at the rear end corner of the top surface of the test bench.

[0012] As a further improvement of the present technical solution, a sleeve is provided at the bottom of the rear end of the large rod sleeve and is tightly fitted with the rear end of the linkage rod. The piston rod arranged in the central axis of the servo electric cylinder faces the rear of the test bench and is provided with a push plate that is tightly fitted with the rear end of the large rod sleeve.

[0013] As a further improvement of the technical solution, a connecting plate is fixedly connected between the cover tube and the inner wall of one side of the cover frame, a plurality of avoidance grooves are provided on the connecting plate and at the connection with the cover tube, a support piece rotatably sleeved with the avoidance groove is clamped at the bottom of the cover tube, and the support piece is fixedly connected to the bottom surface of the top of the test bench by bolts.

[0014] As a further improvement of the present technical solution, the push sleeve part includes a push rod arranged perpendicular to the cement pole, a bracket for supporting the push rod and a guide rod for guiding the lateral movement of the push rod; the horizontal right side wall of the small rod sleeve is provided with a sliding frame which is slidably engaged with the left end of the push rod, the right end of the push rod is rotatably connected to a transmission wheel through a pin, and the transmission wheel is rollingly connected to the oblique side surface of the transmission member toward the middle of the right end of the push rod, a support block which is plugged into the guide rod is vertically provided on the middle bottom surface of the push rod, the left end of the guide rod is fixedly connected to the left end of the bracket, and the outer sleeve of the guide rod is provided with a spring for rebounding the push rod to move right.

[0015] As a further improvement of the technical solution, a pin is embedded in the left end of the push rod towards the front corner, the pin is plugged and slidably connected with the slide frame, a support platform is provided on the top surface of the right end of the bracket, and a hydraulic rod plugged with the support platform is provided in the central axis of the hydraulic cylinder.

[0016] As a further improvement of the technical solution, a support plate is welded to the bottom surface of the right end of the bracket and is clamped with the side wall of the test bench. A fixing sleeve is provided in the rear half of the right side surface of the transmission member, and the fixing sleeve is tightly fitted with the hydraulic rod.

[0017] As a further improvement of the technical solution, a support block is fixedly provided at the front end of the pole groove, the top surface of the support block is an inclined surface, and the small diameter end of the cement pole is supported at the same height as the center of the large diameter end thereof, and rollers are symmetrically provided on both sides of the through groove on the right side, and a number of retaining ring blocks are clamped at equal intervals on the outer side of the rollers.

[0018] On the other hand, the present invention provides a stress performance testing method for a new material cement pole, comprising the following steps:

[0019] S1. First, hang the cement pole onto the pole slot on the top of the test bench;

[0020] S2, then start the servo electric cylinder to drive the large rod sleeve to cover the large diameter end of the cement pole, and push the small rod sleeve to cover the small diameter end of the cement pole;

[0021] S3. When the large pole sleeve moves, the linkage rod suspended below its rear end moves forward in the cover tube, and then a pair of linkage blocks at the front end of the linkage rod engage and slide with a pair of spiral grooves on the inner wall of the middle part of the cover tube, thereby driving the cover tube to rotate half a circle, and then driving the protective cover to flip from the test bench to its top surface and cover the cement pole;

[0022] S4, restart the hydraulic station to provide hydraulic pressure to the hydraulic cylinder, which drives the hydraulic rod to extend and drives the transmission member on its left side to contact the push rod, so that the push rod is pushed horizontally, and then the pushing force is transmitted to the small pole sleeve, that is, to the small diameter end of the cement pole, until the cement pole is broken and the test is completed, and the pushing force data is collected and recorded;

[0023] S5. The broken cement pole is protected by the protective cover and does not splash out.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The stress performance testing platform and method of the new material cement pole are as follows: the cement pole is placed on a test bench, and a fixed pole part is arranged at the front and rear ends of the test bench to fix the large-diameter end of the cement pole and a pressure pole part is arranged to push the small-diameter end of the cement pole, thereby forming a test movement of breaking the cement pole, and then the data is recorded by a pressure gauge; wherein, when the large pole sleeve covers the cement pole, the linkage rod is driven to move forward synchronously and the protective cover is driven to flip from the test bench to its top surface to cover the cement pole, so as to prevent unsafe and untidy conditions caused by splashing cement fragments.

[0026] 2. The stress performance testing platform and method of the new material cement pole saves the overall space occupied by the test bench by providing pressure through the front and rear hydraulic cylinders, and a push sleeve part is provided, and the hydraulic pressure is transmitted laterally by the push rod and the transmission wheel to ensure the application of the thrust of the cement pole; at the same time, the rebound force of the spring is used to offset the inertia of the push sleeve part rushing forward due to the loss of the obstruction of the cement pole.

[0027] 3. The stress performance testing platform and method of the new material cement pole uses a pair of rollers to slide and clamp the protective cover to make it flip. When the protective cover is flipped down and stored, the deformation area affected by the impact of the cement pole breakage is corrected to ensure that the protective cover can be flipped up and down smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0029] Figure 1 It is a schematic diagram of the assembly structure of the overall detection state of the present invention;

[0030] Figure 2 For the present invention Figure 1 A top view of

[0031] Figure 3 It is a front view before detection of the present invention;

[0032] Figure 4 It is a front view of the present invention during detection;

[0033] Figure 5 It is a schematic diagram of the assembly structure of the fixed rod part of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the test bench of the present invention;

[0035] Figure 7 It is a schematic diagram of the assembly structure of the large rod sleeve of the present invention;

[0036] Figure 8 It is a schematic diagram of the protective cover assembly structure of the present invention;

[0037] Fig. 9 A partial cross-sectional view of the middle portion of the shield tube of the present invention;

[0038] Fig.10 For the present invention Fig. 9 A top view of

[0039] Fig.11 A side view of the middle portion of the shield tube of the present invention;

[0040] Fig.12 It is a schematic diagram of the assembly structure of the pressure rod part of the present invention;

[0041] Fig.13 It is a partial exploded view of the pressure rod part of the present invention;

[0042] Fig.14 It is a schematic diagram of the transmission structure of the present invention;

[0043] The meaning of each number in the figure is:

[0044] 100, test bench; 101, rod slot; 102, arc slot; 103, support block; 104, through slot; 105, pressure plate; 106, baffle; 110, roller shaft; 120, baffle block;

[0045] 200, fixed rod; 210, large rod sleeve; 211, sleeve; 212, positioning plate; 220, protective cover; 221, metal mesh; 222, cover frame; 223, cover tube; 2231, slide groove; 2232, spiral groove; 224, connecting plate; 2241, avoidance groove; 225, supporting piece; 230, linkage rod; 231, linkage block; 240, servo electric cylinder; 241, push plate;

[0046] 300, pressure rod part; 310, small rod sleeve; 311, sliding frame; 320, push sleeve part; 321, push rod; 3211, latch; 3212, transmission wheel; 3213, support block; 322, bracket; 3221, support platform; 3222, support plate; 323, guide rod; 324, spring; 330, transmission part; 331, fixed sleeve; 340, hydraulic cylinder; 341, hydraulic rod; 350, hydraulic station. DETAILED DESCRIPTION

[0047] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as falling within the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

[0048] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0049] See also Figure 1-Figure 14 As shown, the present invention provides a stress performance detection test platform for new material cement poles, including a test bench 100 for placing cement poles, a fixed pole part 200 arranged at the rear end of the test bench 100, and a pressure pole part 300 arranged at the front end of the test bench 100; the test bench 100 is built into a box structure with cement; the fixed pole part 200 is used to fix the large diameter end of the cement pole, which is equivalent to a state of being buried in the ground, and the pressure pole part 300 is used to horizontally push the small diameter end of the cement pole to apply a load, test the data of the bending performance of the internal prestressed steel bars, and judge the tensioning effect and stability of the prestressed steel bars by measuring the actual stress level of the prestressed steel bars of the cement poles, so as to put them into use safely and reliably.

[0050] Specifically, the fixed pole part 200 includes a large pole sleeve 210 for positioning and sleeve-joining the large diameter end of the cement pole, a protective cover 220 for covering the top surface of the test bench 100, and a linkage rod 230 that drives the protective cover 220 to flip and switch up and down on the top of the test bench 100 as the large pole sleeve 210 moves forward and backward; a servo electric cylinder 240 for driving the large pole sleeve 210 to move forward and backward is installed on the top surface of the rear end of the test bench 100; the protective cover 220 is provided with a metal mesh 221 and a nylon cloth from the inside to the outside in sequence, and forms a semi-cylindrical shape, the metal mesh 221 is made of steel wire and iron wire to resist the impact force after the cement pole is broken, and the external nylon cloth is used to protect the splash of debris, so as to ensure the safety and cleanliness of the on-site test environment;

[0051] The outer side and both ends of the protective cover 220 are provided with a cover frame 222, which is made of plastic and assembled with a metal mesh 221 and nylon cloth rivets, and is used to prop up the protective cover 220 as a whole to flip up and down on the test bench 100; a cover tube 223 is provided on the central axis of the protective cover 220, and one side of the cover tube 223 is fixedly connected to the inner side of the cover frame 222 located on the outer side; so that the other side of the protective cover 220 is open and can smoothly pass through the test bench 100.

[0052] Furthermore, a slide groove 2231 extending to the middle section is symmetrically provided on the inner wall of the middle section of the cover tube 223, and a spiral groove 2232 is provided on the upper and lower inner walls of the middle section of the cover tube 223. The rear end of the spiral groove 2232 located at the top is connected with the slide groove 2231 located on the left, and the rear end of the spiral groove 2232 located at the bottom is connected with the slide groove 2231 located on the right; the central angle of the twisting of the spiral groove 2232 is 180 degrees; the linkage rod 230 is plugged into the cover tube 223, and linkage blocks 231 are symmetrically provided on both sides of the front end of the linkage rod 230, a pair of linkage blocks 231 are correspondingly plugged into the two slide grooves 2231, and are slidably engaged with the upper and lower spiral grooves 2232; by moving the linkage rod 230 forward, the linkage block 231 is used to slide into the spiral groove 2232, so that the cover tube 223 rotates relative to the linkage rod 230, thereby driving the opening side of the protective cover 220 to pass through the bottom of the test bench 100, thereby covering the cement pole for protection.

[0053] Furthermore, a rod groove 101 is provided on the center line of the front-to-back direction of the top surface of the test bench 100, which is used to stably support the cement pole; an arc groove 102 is provided at the rear end of the rod groove 101 to engage with the large rod sleeve 210, and the arc surface of the arc groove 102 is lower than the arc surface of the rod groove 101, so that the large rod sleeve 210 can be extended and retracted freely, and can be smoothly engaged with the cement pole with the large diameter end suspended in the air; a through groove 104 with a coaxial axis is provided on the top surface of the test bench 100 and on both sides of the rod groove 101, and the protective cover 220 is rotatably plugged into the through groove 104;

[0054] A positioning plate 212 is welded to the horizontal right side of the large rod sleeve 210, and a baffle 106 and a pressure plate 105 that are clamped and engaged with the positioning plate 212 inside and outside are fixedly connected by bolts at the rear end corner of the top surface of the test bench 100 to guide the large rod sleeve 210 to move forward horizontally.

[0055] Furthermore, a sleeve 211 is provided at the bottom of the rear end of the large rod sleeve 210 and is tightly fitted with the rear end of the linkage rod 230. The piston rod arranged in the central axis of the servo electric cylinder 240 faces the rear of the test bench 100 and is sleeved with a push plate 241 that is tightly fitted with the rear end of the large rod sleeve 210.

[0056] Furthermore, a connecting plate 224 is fixedly connected between the cover tube 223 and the inner wall of one side of the cover frame 222, so that the cover tube 223 and the cover frame 222 are connected as a whole and rotate synchronously; a plurality of avoidance grooves 2241 are opened on the connecting plate 224 and at the connection with the cover tube 223, and a support 225 rotatably sleeved with the avoidance groove 2241 is clamped at the bottom of the cover tube 223, and the support 225 is fixedly connected to the bottom surface of the top of the test bench 100 by bolts, that is, the cover tube 223 is supported to rotate by the plurality of supports 225 without interfering with the connecting plate 224.

[0057] Specifically, the pressing rod part 300 includes a small rod sleeve 310 sleeved with the small diameter end of the cement pole, a push sleeve part 320 horizontally slidably engaged with the small rod sleeve 310, a transmission member 330 in sliding contact with the horizontal right end of the push sleeve part 320, and a hydraulic cylinder 340 for driving the transmission member 330 to extend and retract along the front and rear directions of the test bench 100; the driving force of the hydraulic cylinder 340 drives the transmission member 330 to squeeze and push the push sleeve part 320 and the small rod sleeve 310 to move laterally, thereby applying a load to the side wall of the small diameter end of the cement pole; the layout of the hydraulic cylinder 340 saves space, and uses the push sleeve part 320 to reduce the reaction force at the moment of breaking the cement pole, thereby reducing the reaction force on the hydraulic cylinder 340, thereby protecting the hydraulic cylinder 340;

[0058] The transmission member 330 is a long frame structure and has an inclined surface on one side facing the push sleeve portion 320, and has a narrow front end and a wide rear end. The width difference between the front and rear ends of the transmission member 330 is utilized to act on the push sleeve portion 320 to form a horizontal pushing stroke; a hydraulic station 350 is placed outside the test bench 100 to provide hydraulic force to the hydraulic cylinder 340. By connecting a pressure gauge to the pipeline of the hydraulic station 350, the real-time pressure data of the system can be directly read. Both of these are existing technologies and will not be described in detail here.

[0059] It is worth noting that the push sleeve part 320 includes a push rod 321 arranged perpendicular to the cement pole, a bracket 322 for supporting the push rod 321, and a guide rod 323 for guiding the lateral movement of the push rod 321; the horizontal right side wall of the small pole sleeve 310 is provided with a sliding frame 311 that is engaged and slidably connected with the left end of the push rod 321, so that the small pole sleeve 310 can move laterally at the left end of the push rod 321, and wait for the cement pole to be placed before being sleeved;

[0060] The right end of the push rod 321 is rotatably connected to the transmission wheel 3212 through a pin. The transmission wheel 3212 is rollingly connected to the oblique side surface of the transmission member 330 toward the middle of the right end of the push rod 321, so that the force loss is reduced when the thrust is transmitted, and it is also ensured that the force transmitted to the push rod 321 can be applied along the length direction of the push rod 321, thereby smoothly converting the forward driving force of the hydraulic cylinder 340 into a leftward thrust; a support block 3213 plugged into the guide rod 323 is vertically provided on the bottom surface of the middle part of the push rod 321. The guide rod 323 is preferably a square rod structure, the left end of the guide rod 323 is fixedly connected to the left end of the bracket 322, the bracket 322 is fixedly connected to the top surface of the test bench 100 by bolts, and the outer sleeve of the guide rod 323 is provided with a spring 324 for rebounding the push rod 321 to move right, so that after the transmission part 330 is removed, the push sleeve part 320 can be rebounded to drive the small rod sleeve 310 to reset; at the same time, the rebound force of the spring 324 is used to offset the inertia of the push sleeve part 320 rushing forward due to the loss of the obstruction of the cement pole.

[0061] Furthermore, a latch 3211 is embedded at the left end of the push rod 321 at the front corner, and the latch 3211 is plugged and slidably connected with the sliding frame 311, so that the small rod sleeve 310 and the push rod 321 are connected as a whole and will not slip off; a support platform 3221 is provided on the top surface of the right end of the bracket 322, and a hydraulic rod 341 plugged with the support platform 3221 is provided in the central axis of the hydraulic oil cylinder 340. The support platform 3221 is used to keep the hydraulic rod 341 straight and retractable to avoid the recoil force when the cement pole breaks, thereby protecting the hydraulic oil cylinder 340 and making it durable;

[0062] A support plate 3222 is welded to the bottom surface of the right end of the bracket 322, which is clamped with the side wall of the test bench 100, so that the bracket 322 can stably support the telescopic movement of the hydraulic rod 341; a structure similar to the support plate 3222 is installed at the bottom of the hydraulic cylinder 340, and is fixed to the test bench 100 by bolts; a fixing sleeve 331 is provided in the rear half of the right side surface of the transmission member 330, and the fixing sleeve 331 is tightly fitted with the hydraulic rod 341, so that the transmission member 330 and the hydraulic rod 341 move synchronously and apply a load to the push rod 321.

[0063] In addition, a support block 103 is fixedly provided at the front end of the pole groove 101. The top surface of the support block 103 is an inclined surface, and the small diameter end of the supporting cement pole is at the same height as the center of the large diameter end thereof, so that the large pole sleeve 210 and the small pole sleeve 310 can be smoothly connected with the front and rear ends of the cement pole; rollers 110 are symmetrically provided on both sides of the through groove 104 located on the right side, and a plurality of retaining ring blocks 120 are clamped at equal intervals on the outside of the rollers 110; the retaining ring blocks 120 are fixedly connected to the test bench 100 by bolts, and are used to support the rollers 110 to keep them straight. A rubber sleeve is provided on the outside of the rollers 110, and a pair of rollers 110 are used to clamp the rolling protective cover 220. When the protective cover 220 is turned down and stored, the deformation area thereof affected by the impact of the broken cement pole is corrected to ensure that the protective cover 220 can be turned up and down smoothly.

[0064] The stress performance testing method of the new material cement pole of the present invention comprises the following steps:

[0065] S1. First, hang the cement pole onto the pole slot 101 on the top surface of the test bench 100;

[0066] S2, then start the servo electric cylinder 240 to drive the large pole sleeve 210 to cover the large diameter end of the cement pole, and push the small pole sleeve 310 to cover the small diameter end of the cement pole;

[0067] S3. When the large pole sleeve 210 moves, the linkage rod 230 suspended below its rear end moves forward in the cover tube 223, and then a pair of linkage blocks 231 at the front end of the linkage rod 230 engage and slide with a pair of spiral grooves 2232 on the inner wall of the middle part of the cover tube 223, thereby driving the cover tube 223 to rotate half a circle, and then driving the protective cover 220 to flip from the test bench 100 to its top surface to cover the cement pole;

[0068] S4, restart the hydraulic station 350 to provide hydraulic pressure for the hydraulic cylinder 340, so as to drive the hydraulic rod 341 to extend and drive the transmission member 330 on its left side to contact the push rod 321, so as to push the push rod 321 laterally, and then transmit the pushing force to the small pole sleeve 310, that is, to the small diameter end of the cement pole, until the cement pole is broken and the test is completed, and collect and record the pushing force data;

[0069] S5. The broken cement pole is protected by the protective cover 220 and does not splash outward.

[0070] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. The stress performance testing platform of cement poles is characterized by: The invention comprises a test bench (100) for placing a cement pole, a pole-fixing part (200) arranged at the rear end of the test bench (100), and a pole-pressing part (300) arranged at the front end of the test bench (100); the pole-fixing part (200) comprises a large pole sleeve (210) for positioning and sleeved on the large-diameter end of the cement pole, a protective cover (220) for covering the top surface of the test bench (100), and a linkage rod for driving the protective cover (220) to flip and switch up and down on the top of the test bench (100) as the large pole sleeve (210) moves forward and backward (230); a servo electric cylinder (240) for driving the large rod sleeve (210) to move forward and backward is installed on the top surface of the rear end of the test bench (100); the protective cover (220) is provided with a metal mesh (221) and a nylon cloth from the inside to the outside in sequence, and forms a semi-cylindrical shape; the outer side and both ends of the protective cover (220) are provided with a cover frame (222); a cover tube (223) is provided on the central axis of the protective cover (220), and one side of the cover tube (223) is fixedly connected to the inner side of the cover frame (222) located on the outer side; A slide groove (2231) extending to the middle section is symmetrically provided on the inner wall of the middle section of the cover tube (223); spiral grooves (2232) are provided on the upper and lower inner walls of the middle section of the cover tube (223); the rear end of the upper spiral groove (2232) is connected to the slide groove (2231) on the left side, and the rear end of the lower spiral groove (2232) is connected to the slide groove (2231) on the right side; the central angle of the twist of the spiral groove (2232) is 180 degrees; the linkage rod (230) is plugged into the cover tube (223), and linkage blocks (231) are symmetrically provided on both sides of the front end of the linkage rod (230); a pair of linkage blocks (231) are correspondingly plugged into the two slide grooves (2231), and are slidably engaged with the upper and lower spiral grooves (2232); The pressing rod part (300) comprises a small rod sleeve (310) sleeved with the small diameter end of the cement pole, a push sleeve part (320) slidably engaged with the horizontal right side of the small rod sleeve (310), a transmission member (330) in sliding contact with the horizontal right end of the push sleeve part (320), and a hydraulic cylinder (340) for driving the transmission member (330) to extend and retract along the front-rear direction of the test bench (100); the transmission member (330) is a long frame structure and its side facing the push sleeve part (320) is an inclined surface, and has a structure with a narrow front end and a wide rear end; a hydraulic station (350) for providing hydraulic force to the hydraulic cylinder (340) is placed outside the test bench (100).

2. The stress performance testing platform for cement poles according to claim 1 is characterized by: A rod groove (101) is provided on the center line of the front-rear direction of the top surface of the test bench (100); an arc groove (102) is provided at the rear end of the rod groove (101) for engaging with the large rod sleeve (210); the arc surface of the arc groove (102) is lower than the arc surface of the rod groove (101); through grooves (104) with the same central axis are provided on the top surface of the test bench (100) and located on both sides of the rod groove (101); and the protective cover (220) is rotatably plugged into the through groove (104).

3. The stress performance testing platform for cement poles according to claim 2 is characterized by: A positioning plate (212) is fixedly connected to the horizontal right side of the large rod sleeve (210), and a baffle plate (106) and a pressure plate (105) which are clamped and engaged with the positioning plate (212) are arranged at the rear end corner of the top surface of the test bench (100).

4. The stress performance testing platform for cement poles according to claim 3 is characterized by: A sleeve (211) is provided at the bottom of the rear end of the large rod sleeve (210) and is tightly sleeved with the rear end of the linkage rod (230). A piston rod provided in the central axis of the servo electric cylinder (240) faces the rear of the test bench (100) and is sleeved with a push plate (241) that is tightly sleeved with the rear end of the large rod sleeve (210).

5. The stress performance testing platform for cement poles according to claim 4 is characterized by: A connecting plate (224) is fixedly connected between the cover tube (223) and the inner wall of one side of the cover frame (222); a plurality of avoidance grooves (2241) are provided on the connecting plate (224) at the connection with the cover tube (223); a supporting piece (225) rotatably sleeved with the avoidance grooves (2241) is clamped at the bottom of the cover tube (223); and the supporting piece (225) is fixedly connected to the bottom surface of the top of the test bench (100) by bolts.

6. The stress performance testing platform for cement poles according to claim 5 is characterized by: The push sleeve portion (320) comprises a push rod (321) arranged perpendicular to the cement pole, a bracket (322) for supporting the push rod (321), and a guide rod (323) for guiding the push rod (321) to move horizontally; a sliding frame (311) is provided on the horizontal right side wall of the small rod sleeve (310) for sliding engagement with the left end of the push rod (321); the right end of the push rod (321) is rotatably connected to a transmission wheel (3212) via a pin; the transmission wheel (3212) is rollingly connected to the oblique side surface of the transmission member (330) toward the middle of the right end of the push rod (321); a support block (3213) plugged into the guide rod (323) is vertically provided on the bottom surface of the middle part of the push rod (321); the left end of the guide rod (323) is fixedly connected to the left end of the bracket (322); and a spring (324) for rebounding the push rod (321) to move rightward is provided on the outer sleeve of the guide rod (323).

7. The stress performance testing platform for cement poles according to claim 6 is characterized by: A latch (3211) is embedded at the front corner of the left end of the push rod (321), and the latch (3211) is plugged and slidably connected with the slide frame (311). A support platform (3221) is provided on the top surface of the right end of the support seat (322), and a hydraulic rod (341) plugged with the support platform (3221) is provided in the central axis of the hydraulic cylinder (340).

8. The stress performance testing platform for cement poles according to claim 7 is characterized by: A support plate (3222) is welded to the bottom surface of the right end of the bracket (322) and is clamped to the side wall of the test bench (100). A fixing sleeve (331) is provided at the rear half of the right side surface of the transmission member (330). The fixing sleeve (331) is tightly sleeved with the hydraulic rod (341).

9. The stress performance testing platform for cement poles according to claim 8 is characterized by: A support block (103) is fixedly disposed at the front end of the pole slot (101); the top surface of the support block (103) is an inclined surface and supports the small diameter end of the cement pole at the same height as the center of the large diameter end; rollers (110) are symmetrically disposed on both sides of the through slot (104) on the right side; and a plurality of retaining ring blocks (120) are clamped at equal intervals on the outer sides of the rollers (110).

10. A stress performance testing method for cement poles, using the stress performance testing platform for cement poles as claimed in claim 9, characterized in that: The following steps are involved: S1. First, hang the cement pole onto the pole slot (101) on the top surface of the test bench (100); S2, then start the servo electric cylinder (240) to drive the large pole sleeve (210) to cover the large diameter end of the cement pole, and push the small pole sleeve (310) to cover the small diameter end of the cement pole; S3, while the large pole sleeve (210) moves, the linkage rod (230) suspended below the rear end thereof moves forward in the cover tube (223), and a pair of linkage blocks (231) at the front end of the linkage rod (230) engage and slide with a pair of spiral grooves (2232) on the inner wall of the middle portion of the cover tube (223), thereby driving the cover tube (223) to rotate half a circle, and driving the protective cover (220) to flip from the test bench (100) to its top surface to cover the cement pole; S4, restarting the hydraulic station (350) to provide hydraulic pressure to the hydraulic cylinder (340), thereby driving the hydraulic rod (341) to extend and drive the transmission member (330) on the left side thereof to contact the push rod (321), pushing the push rod (321) laterally, and then transmitting the pushing force to the small pole sleeve (310), that is, acting on the small diameter end of the cement pole, until the cement pole is broken and the test is completed, and collecting and recording the pushing force data; S5. The broken cement pole is protected by the protective cover (220) and does not splash outward.

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