Iron tower fixing buffer structure suitable for spiral anchor foundation

Abstract

The utility model belongs to the technical field of power transmission and transformation project supporting facilities, and particularly provides an iron tower fixing buffer structure suitable for a spiral anchor foundation, the iron tower is fixed on the spiral anchor foundation, and the iron tower fixing buffer structure is characterized in that an iron tower footing piece is arranged at the bottom of the iron tower, and a sleeve type support is fixed at the upper end of the spiral anchor foundation; the iron tower footing piece is connected with the support through a screw rod, the screw rod sequentially penetrates through the support and the iron tower footing piece from bottom to top, after the head end of the screw rod penetrates out of the iron tower footing piece, a nut is fixed to the upper end of the screw rod, a baffle is arranged on the inner side of the nut, a damping spring is arranged between the baffle and the iron tower footing piece, and the screw rod is sleeved with the damping spring. A buffer space is provided for upward pulling force borne by the spiral anchor through the elastic space of the spring, damage to undisturbed soil is reduced, and the stability service life of an iron tower is prolonged. When the spiral anchor foundation encounters paroxysmal load, the influence on the spiral anchor foundation is greatly reduced, the spiral anchor foundation can still be kept not easy to loosen, and the danger is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of supporting facilities for power transmission and transformation projects, and specifically provides a buffer structure for fixing iron towers suitable for helical anchor foundations. Background Technology

[0002] In recent years, helical anchor foundations have been widely used in the erection of power transmission towers due to their advantages such as short construction time and strong adaptability to geological conditions. However, in some areas, towers are subjected to repetitive vibration and impact loads, which can generate sudden uplift forces on the helical anchor foundations. This can damage the undisturbed soil surrounding the foundations, even if the load does not exceed the maximum bearing capacity of the undisturbed soil. Frequent vibrations can reduce the effective connection between the helical anchor foundations and the surrounding soil, thus reducing structural performance. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a buffer structure for fixing iron towers on a helical anchor foundation. The iron tower is fixed on the helical anchor foundation, and a base plate is provided at the bottom of the iron tower. A sleeve-type support is fixed at the upper end of the helical anchor foundation. The base plate and the support are connected by a screw. The screw passes through the support and the base plate from bottom to top. After the head end passes through the base plate, a nut is fixed at the upper end. A baffle is provided on the inner side of the nut. A shock-absorbing spring is provided between the baffle and the base plate. The shock-absorbing spring is sleeved on the screw.

[0004] Furthermore, a groove is provided on the baffle, in which a pressure sensor and a detection spring are installed. The upper end of the detection spring contacts the pressure sensor, and the lower end contacts the damping spring, which applies pressure to the detection spring.

[0005] Furthermore, a protective cover is detachably installed on the base plate of the tower, which covers the bolt.

[0006] Furthermore, a nut protective sleeve is provided at the upper end of the screw, serving as a tightening component for the steel nut with threads on its inner side. After the nut is tightened, it fits tightly against the fixing nut of the spiral anchor foundation, and the nut protective sleeve and nut form a double-nut structure.

[0007] This solution provides a buffer structure for fixing iron towers using helical anchor foundations. It's a buffer-type connection method for linking the foundation and tower support, suitable for scenarios where the foundation and tower support are assembled. The spring stiffness can be adjusted according to design requirements to better buffer the stress on the helical anchor foundation. This reduces the damage to the connection between the helical anchor and the undisturbed soil caused by repetitive vibration and impact, ensuring the structural performance. An innovative nut protective sleeve is also included, which serves as a double-nut fastening mechanism for the bolts and effectively protects against damage caused by spring failure. In the event of spring failure, it also acts as an alarm indicator.

[0008] The elastic space of the spring provides a buffer against the upward pull-out force on the helical anchor, reducing damage to the original soil and extending the stability life of the tower. When encountering intermittent loads, the impact on the helical anchor foundation is significantly reduced, and the foundation remains stable, minimizing the risk of loosening. Attached Figure Description

[0009] Figure 1 This is a structural diagram of the present invention;

[0010] Figure 2 This is a diagram showing the location of the nut protector;

[0011] Figure 3 This is a schematic diagram showing the location of the pressure sensor. Detailed Implementation

[0012] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0013] refer to Figure 1-3 This utility model provides a buffer structure for fixing iron towers on a spiral anchor foundation. The iron tower is fixed on the spiral anchor foundation, and a base plate 5 is provided at the bottom of the iron tower. A sleeve-type support 8 is fixed at the upper end of the spiral anchor foundation. The base plate 5 and the support 8 are connected by a screw 1. The screw 1 passes through the support 8 and the base plate 5 from bottom to top. After the head end passes through the base plate 5, a nut 2 is fixed at the upper end. A baffle 3 is fixed inside the nut. A shock-absorbing spring 4 is provided between the baffle 3 and the base plate 5. The shock-absorbing spring 4 is sleeved on the screw 1.

[0014] After placing the damping spring 4 on the screw 1, press the lower part of the damping spring 4 tightly against the tower base plate 5, press the baffle 3 tightly against the upper part of the spring 4, and tighten the nut 2. The upward pull force of the tower on the spiral anchor foundation is buffered at the tower base plate 5 due to the elasticity of the damping spring 4, reducing the upward pull force of the nut 6 on the spiral anchor foundation.

[0015] As an improvement to the design, a groove is provided on the baffle 3, in which a pressure sensor 9 and a detection spring 10 are installed. The upper end of the detection spring 10 contacts the pressure sensor 9, and the lower end contacts a shock-absorbing spring 4, which applies pressure to the detection spring 10. The pressure sensor is connected to a controller to monitor the shock-absorbing spring in real time, preventing damage and failure.

[0016] As an improvement to the design, a protective cover 7 is detachably installed on the base plate 5 of the tower. The protective cover 7 is an internal steel component that covers the screw rod 1 and the spring protective cover prevents the spring 4 from breaking and ejecting due to accidental external force, thus avoiding impact on the outside world.

[0017] As an improvement to the design, a nut protective sleeve 11 is provided at the upper end of the screw 1, which is a steel nut tightening component with threads on the inner side. After the nut 2 is tightened, the nut protective sleeve 11 and the nut 2 form a double-nut structure, which effectively prevents the nut from loosening, as they are tightly attached to the fixing nut 2 of the spiral anchor foundation.

[0018] This connection structure is suitable for power transmission lines, where the foundation and tower support are assembled. The stiffness of the spring can be adjusted according to design requirements to better buffer the stress on the helical anchor foundation.

[0019] This method improves upon previous connection methods. Previously, repeated vibrations and impacts on the towers caused the helical anchor foundation to endure repeated uplift forces, leading to vibrations that damaged the connection between the helical anchor foundation and the soil, thus reducing the overall structural performance. This new connection method improves the stress state of the helical anchor, buffering the uplift forces and minimizing damage to the undisturbed soil. It is suitable not only for the power industry but also for helical anchor foundations in other industries.

[0020] To address the high stiffness and brittleness of the connecting spring, an innovative nut protective sleeve was designed. This sleeve simultaneously functions as a double-nut release mechanism, a pressure loss alarm, and spring breakage protection. It effectively supplements the buffer connection method used in helical anchor foundations and tower construction, ensuring the efficient operation of this connection method.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A buffer structure for fixing a steel tower on a helical anchor foundation, wherein the steel tower is fixed on the helical anchor foundation, characterized in that, The tower is equipped with a base plate at its base, and a sleeve-type support is fixed at the upper end of the spiral anchor foundation. The base plate and the support are connected by a screw. The screw passes through the support and the base plate from bottom to top, and after the head end passes through the base plate, a nut is fixed at the upper end. A baffle is provided on the inner side of the nut. A shock-absorbing spring is provided between the baffle and the base plate, and the shock-absorbing spring is sleeved on the screw.

2. The buffer structure for fixing iron towers using a helical anchor foundation as described in claim 1, characterized in that, A groove is provided on the baffle, and a pressure sensor and a detection spring are installed in the groove. The upper end of the detection spring is in contact with the pressure sensor, and the lower end is in contact with the shock-absorbing spring. The shock-absorbing spring applies pressure to the detection spring.

3. A buffer structure for fixing iron towers using a helical anchor foundation as described in claim 1, characterized in that, A detachable protective cover is installed on the base plate of the tower, which covers the bolt.

4. A buffer structure for fixing iron towers using a helical anchor foundation as described in claim 1, characterized in that, A nut protective sleeve is also provided at the upper end of the screw, which is a steel nut tightening part with threads on the inner side. After the nut is tightened, it is in close contact with the fixing nut of the spiral anchor foundation. The nut protective sleeve and the nut form a double-nut structure.

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