Foundation shock isolation device for power transmission tower

Abstract

The utility model discloses a power transmission tower foundation shock isolation device, which comprises a base unit, a base unit, a base unit and a base unit, the base unit comprises a supporting seat, an annular cover plate and a rolling plate, the supporting seat is provided with a base cavity, the annular cover plate is fixedly arranged on the supporting seat, and the rolling plate is movably arranged in the base cavity; the shock isolation unit comprises an annular elastic pipe, bearing seats and rolling bearings, the annular elastic pipe is arranged between the side portion of the rolling plate and the inner wall of the base cavity, the multiple bearing seats are annularly fixed to the inner bottom face of the base cavity and the lower bottom face of the annular cover plate, and the rolling bearings are installed on the bearing seats and make contact with the end face of the rolling plate; the rolling plate is installed in the base cavity provided with the annular elastic pipe and the rolling bearing, and when an earthquake occurs, on one hand, the annular elastic pipe and the rolling bearing can limit the upward pulling effect and the left-right movement of the tower leg on the rolling plate; and on the other hand, when the rolling plates move, vibration is isolated and impact energy is absorbed through the annular elastic pipes, restoring force is provided for the iron tower foundation, and therefore the good vibration isolation effect is achieved.

Description

Technical Field

[0001] The utility model relates to a seismic isolation device for a transmission tower foundation, belonging to the technical field of transmission tower foundations. Background Art

[0002] As a key structure for supporting a transmission line, a transmission tower is easily severely damaged under the action of seismic forces, thus affecting the normal operation of the transmission system. However, many current transmission lines pass through strong earthquake areas, and it is inevitable to cross potentially seismogenic faults. Therefore, it is of great significance to design a seismic isolation device that can effectively reduce the influence of seismic forces on transmission towers.

[0003] At present, there are already some seismic isolation devices for transmission tower foundations based on materials such as springs and shock absorbers, which are used to reduce the influence of seismic forces on transmission towers. However, these traditional devices have certain deficiencies in terms of seismic isolation effect, durability, installation and maintenance. For example, spring materials are prone to problems such as fatigue and plastic deformation after long-term use, and shock absorbers require regular maintenance and replacement, increasing the operation and maintenance costs. Therefore, it is necessary to re-study a seismic isolation device for a transmission tower foundation to solve the deficiencies of the existing technology, thereby improving the disaster resistance ability and stability of transmission towers. Summary of the Utility Model

[0004] Based on the above, the utility model provides a seismic isolation device for a transmission tower foundation to overcome the deficiencies of the existing technology.

[0005] The technical solution of the utility model is: a seismic isolation device for a transmission tower foundation, comprising:

[0006] A base unit, including a support seat, an annular cover plate and a rolling plate. The support seat has a base cavity, the annular cover plate is fixedly arranged on the support seat, and the rolling plate is movably arranged in the base cavity;

[0007] A seismic isolation unit, including an annular elastic tube, a bearing seat and a rolling bearing. The annular elastic tube is arranged between the side of the rolling plate and the inner wall of the base cavity. A plurality of the bearing seats are circumferentially fixed on the inner bottom surface of the base cavity and the lower bottom surface of the annular cover plate. The rolling bearing is installed on the bearing seat, and the rolling bearing contacts the end face of the rolling plate.

[0008] In one example, the material of the annular elastic tube is a hyperelastic material.

[0009] In one example, the bearing seat is an eccentric bearing seat.

[0010] In one example, the rolling bearing is a cylindrical roller bearing.

[0011] The beneficial effects of the utility model are as follows: by installing the rolling plate in the base cavity provided with the annular elastic tube and the rolling bearing, when an earthquake occurs, on the one hand, the annular elastic tube and the rolling bearing can limit the upward pulling action and left and right movement of the tower legs on the rolling plate; on the other hand, when the rolling plate is active, the annular elastic tube can be used to isolate vibration and absorb impact energy, and provide restoring force for the iron tower foundation, thereby having a better seismic isolation effect. Compared with the prior art, the device has the advantages of stable and reliable structure, low cost and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the elevation view of the base isolation device of the transmission tower;

[0013] Figure 2 It is the plan view of the base isolation device of the transmission tower (excluding the annular cover plate);

[0014] Figure 3 is a schematic diagram of a rolling bearing and a bearing seat;

[0015] Description of reference numerals:

[0016] Base unit: 11 support base, 12 annular cover plate, 13 rolling plate;

[0017] Seismic isolation unit: 21 annular elastic tube, 22 bearing seat, 23 rolling bearing;

[0018] Transmission tower: 31 tower legs, 32 anchor bolts. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0020] See also Figures 1 to 3 , this embodiment provides a transmission tower foundation isolation device, including a base unit and an isolation unit.

[0021] The base unit includes a support base 11, an annular cover plate 12 and a rolling plate 13. The support base 11 has a base cavity. The annular cover plate 12 is fixed on the support base 11. A mounting hole is provided in the middle of the annular cover plate 12. The rolling plate 13 is movably installed in the base cavity. Its size is larger than that of the mounting hole so that it will not separate from the base cavity. The tower leg 31 is installed on the rolling plate 13 by means of anchor bolts 32.

[0022] The seismic isolation unit includes an annular elastic tube 21, a bearing seat 22, and a rolling bearing 23. The annular elastic tube 21 is installed between the side of the rolling plate 13 and the inner wall of the base cavity. Its inner and outer sides are respectively in contact with the side of the rolling plate 13 and the inner wall of the base cavity. A plurality of bearing seats 22 are circumferentially welded to the inner bottom surface of the base cavity and the lower bottom surface of the annular cover plate 12. The rolling bearing 23 is installed on the bearing seat 22. The rolling bearing 23 is in contact with the end face of the rolling plate 13 and can roll along the surface of the rolling plate 13, so that the rolling plate 13 can transfer the load (the force of the iron tower) to the support seat 11.

[0023] By installing the rolling plate 13 in the base cavity provided with the annular elastic tube 21 and the rolling bearing 23, when an earthquake occurs, the rolling plate 13 can move between multiple upper and lower rolling bearings 23. When moving, the annular elastic tube 21 is used to isolate vibrations and absorb shock energy, and provide a restoring force for the iron tower foundation, thus having a better seismic isolation effect. In addition, the annular elastic tube 21 and the rolling bearing 23 can limit the uplift action and left-right movement of the tower leg 31.

[0024] Further, the above-mentioned rolling bearing 23 is a cylindrical roller bearing, which has the advantages of stable and reliable structure.

[0025] Further, to improve the seismic isolation effect, the bearing seat 22 is an eccentric bearing seat 22. The eccentric structure of the eccentric bearing seat 22 can make the rolling direction of the rolling bearing 23 flexible and variable, preventing the rolling action of the seismic isolation device from being locked.

[0026] Further, the material of the annular elastic tube 21 is a hyperelastic material, such as rubber. Since the hyperelastic material has characteristics such as large deformation ability, non-linear stress-strain relationship, high energy absorption ability, and good reusability, it can provide a reset function and energy dissipation ability for the iron tower foundation at the same time during an earthquake, having a very good seismic isolation effect.

[0027] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A transmission tower foundation isolation device, characterized in that: include: A base unit, comprising a support base (11), an annular cover plate (12) and a rolling plate (13), wherein the support base (11) has a base cavity, the annular cover plate (12) is fixedly arranged on the support base (11), and the rolling plate (13) is movably arranged in the base cavity; The seismic isolation unit comprises an annular elastic tube (21), a bearing seat (22) and a rolling bearing (23); the annular elastic tube (21) is arranged between the side of the rolling plate (13) and the inner wall of the base cavity; a plurality of the bearing seats (22) are annularly fixed to the bottom surface of the base cavity and the lower bottom surface of the annular cover plate (12); the rolling bearing (23) is mounted on the bearing seat (22); and the rolling bearing (23) contacts the end surface of the rolling plate (13).

2. The transmission tower foundation isolation device according to claim 1, characterized in that: The material of the annular elastic tube (21) is a superelastic material.

3. The transmission tower foundation isolation device according to claim 1, characterized in that: The bearing seat (22) is an eccentric bearing seat (22).

4. The transmission tower foundation isolation device according to claim 1, characterized in that: The rolling bearing (23) is a cylindrical roller bearing.

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