A repeated pull-out test device and operation method for photovoltaic facilities in sandy areas

Abstract

The invention relates to the technical field of pipe pile test equipment, and in particular to a repeated pull-out test device for photovoltaic facilities in sandy areas and an operating method, wherein the repeated pull-out test device for photovoltaic facilities in sandy areas comprises: a basic base, wherein the basic base is provided with a support; a moving component, wherein the moving component comprises a moving mechanism and a supporting mechanism; a cyclic pulling component, wherein the cyclic pulling component comprises a cyclic mechanism and a transmission mechanism; a sensor component, wherein the sensor component is used to detect the magnitude of the pulling force and the displacement of the experimental pipe pile during the detection experiment; a locking component, wherein the locking component comprises a fixing mechanism and an installation mechanism; the invention provides a simulated photovoltaic facility repeated pull-out test device and an operating method thereof, wherein the cyclic pulling component cyclically applies a vertical pull-out force to the pipe pile of a photovoltaic bracket, thereby overcoming the problem that the prior art cannot simulate the pull-out damage caused by the periodic vertical pull-out force to the extended foundation of the photovoltaic bracket.

Description

Technical Field

[0001] The invention relates to the technical field of pipe pile test equipment, and in particular to a repeated pull-out test device for photovoltaic facilities in sandy areas and an operating method. Background Art

[0002] In photovoltaic power generation technology, in order to ensure the stability of the position and angle of the photovoltaic panels, a specific photovoltaic bracket needs to be set up, and the photovoltaic bracket needs to be erected on a pipe pile foundation to improve the stability of the photovoltaic bracket.

[0003] When photovoltaic facilities are set up in desert areas, they are often affected by wind loads. Under the action of wind loads, the photovoltaic bracket pile foundation will be subjected to periodic tensile stress. Under this cyclic stress, the photovoltaic bracket extension foundation in the foundation may fail to resist pull-out. To ensure the reliability of the foundation, after the pile construction, it is necessary to conduct tensile test tests on it to meet the overall wind resistance and overturning resistance of the photovoltaic panels and photovoltaic brackets. The loading devices currently developed are mainly concentrated on pile foundation model loading devices and methods under the conditions of horizontal loads, vertical loads, or horizontal loads coupled with vertical loads.

[0004] However, the traditional pile foundation loading test device cannot simulate the situation of photovoltaic brackets under cyclic tensile load in sandy areas. Therefore, we introduce a simulated sandy area photovoltaic facility repeated pullout test device and operation method. Summary of the invention

[0005] The purpose of the present invention is to provide a repeated pull-out test device for photovoltaic facilities in sandy areas to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] On the one hand, a repeated pull-out test device for photovoltaic facilities in sandy areas is provided, comprising:

[0008] A basic base, wherein the basic base is provided with a support;

[0009] A moving assembly, the moving assembly comprising a moving mechanism and a supporting mechanism, the moving mechanism is used to drive the basic base to move, and the supporting mechanism is used to support and fix the basic base;

[0010] A circulating pulling assembly, the circulating pulling assembly comprising a circulating mechanism and a transmission mechanism, the circulating mechanism being arranged on the support, the circulating mechanism being used to drive the transmission mechanism to perform up and down reciprocating motion, and the transmission mechanism being used to transmit the pulling force generated by the circulating mechanism to the experimental pipe pile;

[0011] A sensor assembly, the sensor assembly is used to detect the magnitude of the pulling force and the displacement of the experimental pipe pile during the detection experiment; a locking assembly, the locking assembly includes a fixing mechanism and an installation mechanism, the fixing mechanism is used to fix the transmission mechanism and the experimental pipe pile, and the installation mechanism is used to install the sensor assembly while the fixing mechanism fixes the transmission mechanism and the experimental pipe pile.

[0012] Preferably, the moving mechanism comprises fixed wheels and universal wheels, two fixed wheels and two universal wheels are provided, and the fixed wheels and the universal wheels are symmetrically arranged on both sides of the basic base.

[0013] Preferably, the support mechanism includes guide rails and support arms, four guide rails are arranged on the left and right sides of the basic base, and the support arms are connected to the guide rails.

[0014] Preferably, the circulation mechanism includes a synchronous motor, a rotating block, a connecting rod, a roller, a connecting rod, a cross beam, a bracket and a tension spring. The synchronous motor is arranged on the support and is used to drive the rotating block to rotate. The rotating block is connected to the support through a connecting rod. The rotating block is provided with a notch, and the notch is connected with a limiting tooth. The position of the roller is adjusted by connecting the roller to different positions of the limiting tooth. The roller is connected to the connecting rod, and the connecting rod is connected to the cross beam. A semicircular protrusion is provided at one end of the cross beam away from the connecting rod, and the semicircular protrusion is connected to the cross beam slot of the bracket. The tension spring is provided at one end of the connecting rod away from the roller.

[0015] Preferably, the circulation mechanism further includes a turns sensor and an inductive magnetic sheet, wherein the inductive magnetic sheet is disposed on the rotating block, and the turns sensor is disposed on the support, and when the inductive magnetic sheet passes through the turns sensor, the turns sensor will record the number of cycles.

[0016] Preferably, the crossbeam is provided with a semicircular groove coaxially arranged with the semicircular protrusion, the transmission mechanism comprises an anchor ring, an adjustment clip and a steel strand, the anchor ring is arranged on the crossbeam, the adjustment clip is connected to the anchor ring and used to fix the steel strand, the steel strand is connected to the semicircular groove, and both ends of the tension spring are respectively connected to the steel strand and the experimental pipe pile.

[0017] Preferably, the sensor assembly includes a tension sensor and a displacement sensor, the tension sensor is connected to the steel strand, the tension sensor is used to detect the pulling force on the steel strand, and the displacement sensor is arranged on the foundation base, and the displacement sensor is used to detect the pulling height of the experimental pipe pile.

[0018] Preferably, the fixing mechanism includes an upper anchor, a lower anchor and a fixing tube, the upper anchor is arranged at the bottom of the steel strand, the lower anchor is arranged at the prestressed steel bundle of the experimental pipe pile, and fixing tubes are arranged corresponding to the upper anchor and the lower anchor, and a fixing rod is arranged in the fixing tube, and the steel strand and the experimental pipe pile are connected to each other by respectively connecting the two ends of the tension spring to the fixing rods of different fixing tubes.

[0019] Preferably, the fixing tube connected to the upper anchor is composed of two hollow semi-cylinders, the mounting mechanism includes a U-shaped rod, the tension sensor is provided with a fixing groove 1 at the end away from the steel strand, and the two hollow semi-cylinders are both provided with a fixing groove 2, and the U-shaped rod is sequentially inserted into the fixing groove 2 and the fixing groove 1 on both sides of the fixing tube and fixed by bolts to assemble the fixing tube and connect the tension sensor and the fixing tube to each other.

[0020] On the other hand, an operating method is provided for using the above-mentioned sandy area photovoltaic facility repeated pull-out test device, comprising the following steps:

[0021] S1: Install the experimental device in the experimental area;

[0022] S2: prestressed steel strands connecting the experimental pipe piles;

[0023] S3: Install sensor components;

[0024] S4: Start the synchronous motor and conduct the pull-out test.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention provides a device for simulating repeated pull-out resistance of photovoltaic facilities and an operating method thereof, which cyclically applies vertical pull-out force to the photovoltaic support piles through a cyclic pull-out assembly, thereby overcoming the problem that the prior art cannot simulate the pull-out damage caused by the periodic vertical pull-out force to the photovoltaic support extension foundation;

[0027] (2) The invention uses spring deformation to generate tension, which belongs to flexible loading. Compared with the impact load of traditional devices, it can better simulate the pulling effect of wind load in the desert on the expansion foundation of photovoltaic brackets. At the same time, it can be adapted to different tension springs, and the spring model can be flexibly changed for different photovoltaic experimental piles;

[0028] (3) The present invention sets the right end of the crossbeam as a semicircular groove and the lower end of the crossbeam as a concentric circle, so that when the crossbeam is working, the steel strands and the prestressed steel bundles of the test pipe piles are always vertically aligned, preventing the device from shifting force during repeated pulling, and ensuring that the test pipe piles are always subjected to a vertical upward pulling force.

[0029] (4) The present invention can install the tension sensor and the steel strands while connecting the prestressed steel strands and the steel strands of the experimental pipe piles to each other through the installation mechanism, thereby saving installation time and facilitating the experiment.

[0030] (5) The present invention visualizes the magnitude of the pulling force, the number of loading times, and the displacement of the foundation pipe piles, making the experimental data more accurate and the experimental process safer, thereby providing an important experimental means for reasonably evaluating the pull-out bearing capacity and deformation performance of the photovoltaic support extension foundation under cyclic vertical pull-out force loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The axial structure of the present invention is schematically shown Figure 1 ;

[0032] Figure 2 for Figure 1 A schematic diagram of the partial enlarged structure of the middle A area;

[0033] Figure 3 This is a schematic diagram of the axial structure of the basic base of the present invention;

[0034] Figure 4 It is a schematic diagram of the positions of the fixed wheels and the universal wheels on the basic base of the present invention;

[0035] Figure 5 The axial structure of the present invention is schematically shown Figure 2 ;

[0036] Figure 6 for Figure 5 A partial enlarged schematic diagram of the middle B area (the hollow semi-cylinder on one side of the fixed cylinder is omitted);

[0037] Figure 7 The axial structure of the present invention is schematically shown Figure 3 ;

[0038] Figure 8 for Figure 7 A partial enlarged schematic diagram of the middle C area;

[0039] Fig. 9 It is a schematic diagram of the connection structure between the rotating block and the roller of the present invention;

[0040] Fig.10 This is a schematic diagram of the roller shaft structure of the present invention;

[0041] Fig.11 This is a schematic diagram of the shaft structure of the synchronous motor of the present invention;

[0042] Fig.12 This is a schematic diagram of the crossbeam axial structure of the present invention;

[0043] Fig.13It is a schematic diagram of the explosion structure of the tension sensor and the U-shaped rod of the present invention.

[0044] In the figure: 11 basic base, 111 guide rail, 112 groove, 113 baffle, 114 positioning arrow, 12 support arm, 13 directional wheel, 14 universal wheel, 2 support, 4 bracket, 41 cross beam slot, 411 shaft hole, 51 rotating block, 511 connecting rod, 512 cross slot, 513 slot, 514 limit tooth, 52 roller, 521 elliptical column, 522 tooth plate, 53 connecting rod, 54 cross beam, 541 anchor ring, 542 semicircular protrusion, 543 semicircular groove, 55 synchronous motor, 551 cross swivel, 61 upper anchor, 611 lower anchor, 62 fixing tube, 621 fixing rod, 63 steel strand, 64 tension spring, 65 adjustment clip, 71 tension sensor, 711 U-shaped rod, 72 displacement sensor, 721 connection box, 723 ejector pin, 73 turns sensor, 731 induction magnetic sheet, 8 experimental pipe piles, 81 prestressed steel bundle, 82 gasket, 91 fixing slot one, 92 fixing slot two. DETAILED DESCRIPTION

[0045] 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. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1-13 , the present invention provides a technical solution:

[0047] A repeated pull-out test device for photovoltaic facilities in sandy areas, as shown in the accompanying drawings of the specification, comprises:

[0048] A basic base 11, a groove opening 112 is arranged at the front end of the basic base 11, a baffle 113 is arranged on one side of the groove opening 112, and positioning arrows 114 for facilitating the installation of the experimental pipe pile 8 are arranged on both sides of the groove opening 112 and above the baffle 113, so as to ensure that the locking assembly can pull the experimental pipe pile 8 (prestressed steel bundle 81) to always keep it in a straight line for reciprocating motion during the experiment, and the basic base 11 is provided with a support 2, and the support 2 is used to install the circulation mechanism, and the bottom of the support 2 is provided with bolt holes matching the basic base 11, and both sides of the support 2 are provided with connection ports matching the rotating block 51, and the support 2 is provided with a hole for installing the synchronous motor 55, and a fixed card slot for installing the number of turns sensor 73 is provided on one side of the support 2;

[0049] A moving assembly, the moving assembly includes a moving mechanism and a supporting mechanism, the moving mechanism is used to drive the basic base 11 to move, and the supporting mechanism is used to support and fix the basic base 11;

[0050] A circulating pulling assembly, which includes a circulating mechanism and a transmission mechanism. The circulating mechanism is arranged on the support 2. The circulating mechanism is used to drive the transmission mechanism to reciprocate up and down. The transmission mechanism is used to transmit the tension generated by the circulating mechanism to the experimental pipe pile 8.

[0051] A sensor assembly, the sensor assembly is used to detect the magnitude of the pulling force and the displacement of the test pile 8 during the test; and

[0052] The locking assembly includes a fixing mechanism and an installation mechanism. The fixing mechanism is used to fix the transmission mechanism and the experimental pipe pile 8. The installation mechanism is used to install the sensor assembly while the fixing mechanism fixes the transmission mechanism and the experimental pipe pile 8.

[0053] The moving mechanism includes fixed wheels 13 and universal wheels 14. Two fixed wheels 13 and universal wheels 14 are provided. The fixed wheels 13 and universal wheels 14 are symmetrically arranged on both sides of the base 11. The moving mechanism is used to allow the entire experimental device to freely adjust the moving direction.

[0054] The supporting mechanism includes guide rails 111 and support arms 12 . Four guide rails 111 are arranged on the left and right sides of the base 11 , and the support arms 12 are connected to the guide rails 111 .

[0055] The circulation mechanism includes a synchronous motor 55, a rotating block 51, a connecting rod 511, a roller 52, a connecting rod 53, a cross beam 54, a bracket 4 and a tension spring 64. The synchronous motor 55 is arranged on the support 2 and is used to drive the rotating block 51 to rotate. In this embodiment, the synchronous motor 55 is configured with two parts to work simultaneously. A cross rotating head 551 is provided at the head of the synchronous motor 55, which can be inserted into the cross slot 512 of the rotating block 51 and drive the rotating block 51 to rotate. There are also two rotating blocks 51. A connecting rod 511 is provided at one end of the two rotating blocks 51. When in use, the connecting rod 511 will be inserted into the connecting port set in the support 2. The connecting rod 511 is provided with a matching synchronous motor 55. The cross slot 512 of the cross rotating head 551, the rotating block 51 is connected to the support 2 through the connecting rod 511, the rotating block 51 is provided with a notch 513, the notch 513 is connected to the limiting tooth 514, the roller 52 is symmetrically provided with elliptical cylinders 521 on both sides, the elliptical cylinder 521 can be matched and connected to the notch 513, and a tooth plate 522 is fixed on the elliptical cylinder 521 by bolts. The tooth plate 522 is connected to different positions of the limiting tooth 514 to adjust the position of the roller 52, the roller 52 is rotatably connected to the connecting rod 53, and the connecting rod 53 is rotatably connected to the beam 54 at one end away from the roller 52, and a connecting hole is provided at one end of the beam 54, and the connecting hole is used to connect with the connecting rod 53. A semicircular groove 543 and a semicircular protrusion 542 are provided at the other end of the beam 54. The semicircular groove 543 and the semicircular protrusion 542 at the lower end of the beam 54 are concentrically arranged. The semicircular groove 543 is used to guide the direction of the steel strand 63. The semicircular protrusion 542 can be inserted into the beam slot 41 of the bracket 4 and connected to the bracket 4 through a pin shaft. This ensures that when the cross beam 54 is working, the locking assembly and the prestressed steel bundle 81 of the test pipe pile 8 are always vertically aligned, and the vertical tangent position of the semicircular groove 543 remains unchanged, thereby preventing the device from having force deviation during repeated loading and ensuring that the test pipe pile 8 is always subjected to a vertical upward pulling force. The end of the cross beam 54 away from the connecting rod 53 is connected to the bracket 4, and the bracket 4 is arranged on the basic base 11. In this embodiment, the length of the power arm of the cross beam 54 is set to 8 times the length of the resistance arm, which can greatly reduce the load of the synchronous motor 55. The bracket 4 is used to support the movement of the cross beam 54. Four bolt holes are arranged at the bottom of the bracket 4, so that the bracket 4 can be fixed after being placed in the basic base 11. A cross beam slot 41 is arranged on the top of the bracket 4, and a shaft hole 411 is arranged on the left and right of the cross beam slot 41. The shaft hole 411 is used to facilitate the connection between the bracket 4 and the cross beam 54. The tension spring 64 is arranged at the end of the connecting rod 53 away from the roller 52.

[0056] The circulation mechanism also includes a turn sensor 73 and an inductive magnetic sheet 731. The turn sensor 73 is a magnetic induction angle position sensor. When the inductive magnetic sheet 731 passes through the turn sensor 73, it will be recorded. The inductive magnetic sheet 731 is arranged on the rotating block 51, and the turn sensor 73 is arranged on the support 2. When the inductive magnetic sheet 731 passes through the turn sensor 73, the turn sensor 73 will record the number of cycles.

[0057] The transmission mechanism includes an anchor ring 541, an adjusting clip 65 and a steel strand 63. The anchor ring 541 is arranged on the crossbeam 54. The adjusting clip 65 is connected to the anchor ring 541 and is used to fix the anchor ring 541 and then fix the steel strand 63. The two ends of the tension spring 64 are respectively connected to the steel strand 63 and the experimental pipe pile 8.

[0058] The sensor assembly includes a tension sensor 71 and a displacement sensor 72. The tension sensor 71 is connected to the steel strand 63. The tension sensor 71 is used to detect the pulling force on the steel strand 63. The displacement sensor 72 is used to detect the pulling height of the experimental pipe pile 8. The displacement sensor 72 includes a sensor body, a sensor bracket and a connection box 721. The connection box 721 is interconnected with the baffle 113 of the foundation base 11. During the experiment, the top pin 723 of the displacement sensor 72 is vertically pressed against the surface of the experimental pipe pile 8. Therefore, the height of the experimental pipe pile 8 being pulled can be calculated based on the distance moved by the top pin 723. In actual use, a laser displacement sensor can also be used instead of the above-mentioned displacement sensor 72. When using the laser displacement sensor, ensure that the prestressed steel bundle 81 of the experimental pipe pile 8 is located at the intersection of the positioning arrow 114. At the same time, adjust the position of the laser displacement sensor 72 to ensure that the laser beam can stably irradiate the surface of the experimental pipe pile 8. The laser displacement sensor is a prior art, and the specific model can be selected according to the actual situation.

[0059] The fixing mechanism includes an upper anchor 61, a lower anchor 611 and a fixing tube 62. The upper anchor 61 is arranged at the bottom of the steel strand 63, and the lower anchor 611 is arranged at the prestressed steel bundle 81 of the experimental pipe pile 8. A fixing tube 62 is arranged corresponding to the upper anchor 61 and the lower anchor 611. A fixing rod 621 is arranged in the fixing tube 62. The steel strand 63 and the experimental pipe pile 8 are connected to each other by connecting the two ends of the tension spring 64 to the fixing rods 621 of different fixing tubes 62.

[0060] The fixing tube 62 connected to the upper anchor 61 is composed of two hollow semi-cylinders, and the mounting mechanism includes a U-shaped rod 711. The U-shaped rod 711 is used to further limit the upper anchor 61 and fix one end of the tension sensor 71. A fixing groove 91 is provided at the end of the tension sensor 71 away from the steel strand 63, and both hollow semi-cylinders are provided with a fixing groove 92. The U-shaped rod 711 is inserted into the fixing groove 92 and the fixing groove 91 on both sides of the fixing tube 62 in turn and fixed by bolts to assemble the fixing tube 62 and connect the tension sensor 71 and the fixing tube 62 to each other.

[0061] Working principle:

[0062] For the installation of this experimental device, first move the basic base 11 so that the experimental pipe pile 8 is located in the groove 112 at the front end of the basic base 11, and then use the positioning arrow 114 (the positioning arrow 114 is set on one side of the groove 112 of the basic base 11) to adjust the position of the device to ensure that the prestressed steel bundle 81 of the experimental pipe pile 8 is located at the intersection of the positioning arrow 114; use the jack to install the four support arms 12 in the guide rail 111 of the basic base 11; connect and fix the bracket 4 to the basic base 11; connect and fix the support 2 to the basic base 11. Fix; connect the roller 52 to the two rotating blocks 51, and fix the roller 52 at the innermost side of the slot 513 with the toothed plate 522; connect the connecting rod 53 to the roller 52 with a hoop, and then fix it through two bolt holes; connect the crossbeam 54 to the bracket 4 through the lower end shaft hole 411; match and connect the crossbeam 54 to the connecting rod 53; insert the cross swivel 551 of the two synchronous motors 55 into the cross slot 512 of the connecting rod 511 of the rotating block 51, and then fix the two synchronous motors 55 in the left hole and the right hole respectively through the screw holes.

[0063] For the connection of the prestressed steel bundle 81 of the experimental pipe pile 8, start the synchronous motor 55 to drive the crossbeam 54 to move, and stop when the semicircular groove 543 at the right end of the crossbeam 54 is at the lowest point; place the lower anchor 611 on the gasket 82 of the experimental pipe pile 8 and connect it to the prestressed steel bundle 81, and match and connect a set of lower anchors 611 of the fixing cylinder 62, and connect the tension spring 64 to the fixing cylinder 62; place the steel strand 63 in the semicircular groove 543 at the right end of the crossbeam 54, and extend one end into the anchor ring 541 on the upper part of the crossbeam 54 , and adjust to a suitable lowering length, fix the steel strand 63 with the adjusting clip 65, and connect the upper anchor 61 to the other end of the steel strand 63; connect the fixing tube 62 to the upper anchor 61, and insert the tension spring 64 into the fixing tube 62, and then insert the U-shaped rod 711 into the fixing groove 2 92 and the fixing groove 1 91 which are sequentially inserted on both sides of the fixing tube 62 and fix them with bolts to complete the installation of the tension sensor 71 and the fixing tube 62 at the same time and further improve the connection stability of the upper anchor 61 and the fixing tube 62;

[0064] For the installation of the sensor assembly, the pin 723 of the displacement sensor 72 is vertically pressed against the surface of the experimental pipe pile 8, and the sensor bracket 4 is connected to the connection box 721, and the height of the connection box 721 is adjusted so that the displacement sensor 72 displays 0mm; the turn sensor 73 is fixed in the fixed card slot of the support 2, and the induction magnetic sheet 731 is correspondingly attached to the rotating block 51;

[0065] When conducting the pull-out test, the speed of the synchronous motor 55 is set to 30 r / min, the loading time is set to 10 min, and the synchronous motor 55 is started until the loading is completed; the toothed disc 522 is pulled out, the distance between the three teeth of the roller 52 is adjusted backward, and the toothed disc 522 is inserted, and finally the bolt is inserted into the bolt hole to prevent the toothed disc 522 from slipping, and the speed of the synchronous motor 55 is set to 30 r / min, the loading time is set to 10 min, and the synchronous motor 55 is started until the loading is completed; the above operation is repeated, each time the distance between the three teeth of the roller 52 is adjusted backward, the speed is set to 30 r / min, and the loading time is set to 10 min to perform the pull-out test, and a total of 8 repetitions are performed, which is regarded as a pull-out cycle, and the cycle is repeated until the experimental pipe pile 8 is destroyed; when the displacement sensor 72 shows that the experimental pipe pile 8 is pulled out by 5 cm, it is regarded as destroyed, loading is stopped, and the data in the sensor component of the experimental process are counted.

[0066] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A repeated pull-out test device for photovoltaic facilities in sandy areas, characterized in that: include: A basic base, wherein the basic base is provided with a support; A moving assembly, the moving assembly comprising a moving mechanism and a supporting mechanism, the moving mechanism is used to drive the basic base to move, and the supporting mechanism is used to support and fix the basic base; A circulating pulling assembly, the circulating pulling assembly comprising a circulating mechanism and a transmission mechanism, the circulating mechanism being arranged on the support, the circulating mechanism being used to drive the transmission mechanism to perform up and down reciprocating motion, and the transmission mechanism being used to transmit the pulling force generated by the circulating mechanism to the experimental pipe pile; A sensor assembly, the sensor assembly is used to detect the magnitude of the pulling force and the displacement of the experimental pipe pile during the detection experiment; a locking assembly, the locking assembly includes a fixing mechanism and a mounting mechanism, the fixing mechanism is used to fix the transmission mechanism and the experimental pipe pile, and the mounting mechanism is used to install the sensor assembly while the fixing mechanism fixes the transmission mechanism and the experimental pipe pile; The circulation mechanism comprises a synchronous motor, a rotating block, a connecting rod, a roller, a connecting rod, a cross beam, a bracket and a tension spring, the synchronous motor is arranged on the bracket and is used to drive the rotating block to rotate, the rotating block is connected to the bracket through a connecting rod, the rotating block is provided with a notch, the notch is connected to a limiting latch tooth, and the position of the roller is adjusted by connecting the roller to different positions of the limiting latch tooth, the roller is connected to the connecting rod, the connecting rod is connected to the cross beam, a semicircular protrusion is arranged at one end of the cross beam away from the connecting rod, the semicircular protrusion is connected to the cross beam slot of the bracket, and the tension spring is arranged at one end of the connecting rod away from the roller; The circulation mechanism further comprises a turn number sensor and an induction magnetic sheet, wherein the induction magnetic sheet is arranged on the rotating block, and the turn number sensor is arranged on the support, and when the induction magnetic sheet passes through the turn number sensor, the turn number sensor will record the number of cycles; The crossbeam is provided with a semicircular groove coaxially arranged with the semicircular protrusion, the transmission mechanism comprises an anchor ring, an adjustment clip and a steel strand, the anchor ring is arranged on the crossbeam, the adjustment clip is connected to the anchor ring and used to fix the steel strand, the steel strand is connected to the semicircular groove, and the two ends of the tension spring are respectively connected to the steel strand and the experimental pipe pile; The sensor assembly includes a tension sensor and a displacement sensor. The tension sensor is connected to the steel strand and is used to detect the pulling force on the steel strand. The displacement sensor is arranged on the foundation base and is used to detect the pulling height of the experimental pipe pile. The fixing mechanism comprises an upper anchor, a lower anchor and a fixing tube, wherein the upper anchor is arranged at the bottom of the steel strand, and the lower anchor is arranged at the prestressed steel bundle of the experimental pipe pile, and fixing tubes are arranged corresponding to the upper anchor and the lower anchor, and fixing rods are arranged in the fixing tubes, and the steel strand and the experimental pipe pile are connected to each other by connecting the two ends of the tension spring to the fixing rods of different fixing tubes respectively; The fixing tube connected to the upper anchor is composed of two hollow semi-cylinders, and the mounting mechanism includes a U-shaped rod. A fixing groove 1 is provided at the end of the tension sensor away from the steel strand, and both of the two hollow semi-cylinders are provided with a fixing groove 2. The U-shaped rod is sequentially inserted into the fixing groove 2 and the fixing groove 1 on both sides of the fixing tube and fixed by bolts to assemble the fixing tube and connect the tension sensor and the fixing tube to each other.

2. The repeated pull-out test device for photovoltaic facilities in sandy areas according to claim 1 is characterized by: The moving mechanism comprises fixed wheels and universal wheels, two fixed wheels and two universal wheels are provided, and the fixed wheels and the universal wheels are symmetrically arranged on both sides of the basic base.

3. The repeated pull-out test device for photovoltaic facilities in sandy areas according to claim 1 is characterized by: The support mechanism comprises guide rails and support arms. Four guide rails are arranged on the left and right sides of the basic base, and the support arms are connected to the guide rails.

4. An operating method for using the repeated pull-out test device for photovoltaic facilities in sandy areas according to any one of claims 1 to 3, characterized in that: The steps include: S1: Install the experimental device in the experimental area; S2: prestressed steel strands connecting the experimental pipe piles; S3: Install sensor components; S4: Start the synchronous motor and conduct the pull-out test.

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