CN209169891U - Split self-supporting angle steel steel pipe combined cable terminal platform - Google Patents

Abstract

The utility model relates to a cable terminal platform on a transmission line iron tower, in particular to a split self-supporting angle steel steel pipe combined cable terminal platform. On both sides of the sub-terminal platform, each sub-terminal platform includes a plurality of columns and an integral platform structure surface installed on the upper end surface of the plurality of columns. The platform structure surface is installed with a number of cable terminals and arresters. There are 1-2 maintenance ladders on one side. The advantages of the utility model are: firstly, the complete separation between the cable terminal platform and the terminal tower is ensured, and they are independent and do not affect each other; in addition, the stability and reliability of the cable terminal platform structure are ensured, the construction efficiency is improved, and the convenience for overhaul and maintenance.

Description

Split self-supporting angle steel steel pipe combined cable terminal platform

technical field

The utility model relates to a cable terminal platform on an iron tower of a transmission line, in particular to a split self-supporting angle steel steel pipe combined cable terminal platform.

Background technique

In the prior art, most of the cable terminal platforms are directly arranged on the terminal iron tower, and the main material of the iron tower is subjected to force and the iron tower becomes a whole, which is a kind of cable terminal platform that does not fall to the ground. The problems of this platform are: 1. Under normal circumstances The load that the platform can bear is small, and it needs to be staked out together with the tower. It not only needs to check the bearing capacity of the tower material according to the actual conditions, so that the force and deformation capacity of the platform is limited, and the verification and modeling conditions are complicated, which requires a lot of time. Manpower and material resources; 2. Most of the connecting columns for cables going down from the platform are cantilevered. Due to the high platform, the structural deflection under normal conditions is large, and the structure of the connection between the cable and the cable head has a greater safety hazard.

In order to solve the above problems, Chinese patent CN201420482164.8 proposes an integral independent cable terminal platform. Tower legs are set to separate the cable terminal platform from the iron tower, and the two main platforms connected to each other are distributed on both sides of the iron tower. Semi-lap connection (the middle part needs to pass through the iron pole of the tower and interfere and connect with the iron pole), so most of the load is transmitted to the corresponding ground foundation through the tower legs that fall directly. This scheme still has the following shortcomings in practical engineering applications:

1. The foundation of the cable terminal platform and the tower foundation are independent of each other. The load of the platform foundation is much smaller than the load of the cable terminal tower. Under the same geological conditions, the platform foundation is much smaller than the tower foundation. Under normal conditions, the difference between the two bearing layers is relatively large. Therefore, after the completion of the platform, there will be uneven settlement. At this time, the lap joint between the platform surface and the tower is easily affected, resulting in uneven inner and outer surface of the platform surface, which not only affects the appearance, but also has certain operation and maintenance risks.

2. The requirements on the accuracy of civil construction for overhead lines and cable lines are quite different (overhead lines are divided into foundation pits with central piles and line corners, the deviation of the foundation position often exceeds 10cm, and cable structures are controlled with cm-level accuracy, while the tower and The connection between the platforms needs to reach the mm level), so the negotiated connection between the cable terminal platform and the tower is often deviated during the actual construction (mainly the cable terminal platform is offset relative to the tower), resulting in no further installation.

3. In order to adapt to the terrain, the tower legs adopt a tower truss structure, which is arranged in a point distribution manner between the platform and the foundation (refer to Figures 1 and 2 in the description of the patent). And the design is more complex and cumbersome.

In addition, those skilled in the art have also proposed an independent column type, where the cable terminal is divided into six independent column platforms, which flexibly operates the space. The area is small, the operation space is insufficient, and the personnel have to frequently board the platform, which makes the operation extremely inconvenient and takes a lot of time; in addition, the single column structure will be unstable under the action of horizontal loads (wind load, earthquake action). , it is necessary to increase the diameter of the column and the depth of the foundation to ensure stability; and the structure of the column that is too scattered will also cause inconvenience to the connection between the cable head and the cable.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a split self-supporting angle steel pipe combination with stable structure, convenient construction, effectively avoiding interference with the iron tower, and providing operating space for equipment installation, maintenance and daily inspection according to the deficiencies of the prior art. Cable termination platform.

The purpose of this utility model is to achieve through the following approaches:

The main point of the structure of the split self-supporting angle steel steel pipe combined cable terminal platform is that it includes two sub-terminal platforms, each of which is independently installed on both sides of the terminal tower. There is an integral platform structure surface on the upper end surface of the vertical column, a number of cable terminals and arresters are installed on the platform structure surface, and 1-2 maintenance ladders are arranged on one side of the platform structure surface.

As a result, the cable terminal platform is divided into two parts, which are independent of each other. In addition to being separated from the terminal tower on the basis, the platform structure is also completely physically separated from the terminal tower. The two can be constructed separately without affecting each other, shortening the construction period. The construction period not only avoids the problem that the terminal tower needs to bear the load and weight of the platform and its upper equipment, but also solves the problems of poor installation due to foundation deviation and poor structural flatness after installation; in addition, it can also solve the construction of overhead iron towers. A series of problems caused by low stakeout accuracy can also solve the problem that the construction timing of cable terminal tower and cable terminal platform is quite different in daily engineering.

In the above-mentioned separate and independent state, the sub-terminal platform on each side maintains the integrity and provides an integral platform structure surface. Such an integral platform structure surface has a certain width and length, which can meet the needs of people passing through. The artificially operated platform has the operating space for equipment installation, maintenance and daily inspection, which is convenient for daily operation and maintenance work; and multiple columns are co-stressed, under the action of horizontal load (wind load or seismic load), The columns and foundations are still dominated by tension and compression, which not only reasonably reduces the column components and their basic specifications, but also significantly improves the deformation control capability, which ensures the flatness of the top of the platform structure and the connection between cables and cable terminals. Deformation control capability improves device safety at runtime.

The utility model can be further specifically as follows:

The platform structure surface is a fully paved grid panel surface.

Or, the platform structure surface is a checkered steel plate surface.

The platform structure surface is an integral structure on one side, which mainly provides equipment installation platform and operation and maintenance operation platform.

The upright column is formed of a rectangular hollow square tube, and is connected with the ground foundation through anchor bolts.

The rectangular hollow square tube column is adopted, and in the structure controlled by the slenderness ratio, the steel material is reasonably saved, and the rigidity of the fixed support of the cable from the underground to the tower support fixture is improved.

A cross support is arranged between two adjacent uprights on each sub-terminal platform.

The cross support is also called scissor support, which meets the requirements of horizontal bearing between the platform columns and improves the rigidity of the fixed support of the cable clamp, thereby improving the deformation control ability of the connection between the cable and the joint, and reducing the operation risk.

To sum up, the utility model provides a split self-supporting angle steel steel pipe composite cable terminal platform, which adopts two sub-terminal platforms to be installed separately and independently, and at the same time, each sub-terminal platform has an integral structure and is supported by a column. . This ensures the complete separation between the cable terminal platform and the terminal tower, which are independent and independent of each other, ensures the stability and reliability of the cable terminal platform structure, improves construction efficiency, and facilitates inspection and maintenance.

Description of drawings

1 is a schematic diagram of the distribution plane structure of the relative relationship between the split self-supporting angle steel steel pipe composite cable terminal platform and the terminal tower according to the utility model;

Fig. 2 is the front elevation structure schematic diagram of the sub-terminal platform of the split self-supporting angle steel steel pipe composite cable terminal platform according to the utility model;

Fig. 3 is a schematic view of the lateral elevation structure of the sub-terminal platform of the split self-supporting angle steel-steel combined cable terminal platform according to the utility model.

The present utility model will be further described below in conjunction with the embodiments.

Detailed ways

Best practice:

Referring to the accompanying drawings 1-3, the split self-supporting angle steel steel pipe combined cable terminal platform includes two sub-terminal platforms, which are independently installed on the left and right sides of the cable terminal tower; each sub-terminal platform includes a plurality of uprights 1 and an integral platform structure surface 2 installed on the upper end surfaces of the plurality of uprights. The columns 1 of each sub-terminal platform are arranged in two rows and three columns in total, and are composed of rectangular hollow square tubes, and are connected to the ground foundation 6 through anchor bolts. Support 8 for strengthening the structure. The platform structure surface 2 is a full grating surface or a patterned steel plate, in the form of angle steel or other hot-rolled steel. Several cable terminals 3 and arresters 4 are installed on the platform structure surface 2, on one side of the platform structure surface 2. Two maintenance ladders 5 are arranged on the side, and the maintenance ladders 5 are installed on the ladder foundation 7 on the ground.

The main technical parameters of the present embodiment and the features of the structural form are as follows:

(1) The cable terminal platform adopts a split self-supporting structure type. The cable terminal platform structure and the cable terminal tower are completely separated from the physical structure, not only the upper structure is independent of each other, but also the foundation is relatively independent;

(2) The platform adopts a self-supporting force transmission system, with 2 and 3 vertical columns set up horizontally and vertically, and scissor braces are set between the columns to meet the horizontal load transmission and stability requirements;

(3) The vertical top-to-bottom of the platform is: the platform structure surface, platform beam and platform column that are covered with hot-rolled steel such as grid plate or pattern steel plate, angle steel or channel steel.

The technical advantages of the present utility model are:

1. Physically separate the cable terminal platform from the cable terminal tower, which not only avoids the influence of the platform structure on the force of the terminal tower, but also avoids the mutual influence of the two in construction and installation.

2. The rectangular hollow square tube column is adopted. In the structure controlled by the slenderness ratio, the steel material is reasonably saved, and the rigidity of the fixed support of the cable from the underground to the tower support fixture is improved.

The unmentioned part of the present invention is the same as that of the prior art.

Claims (5)

1. seperated self-supporting angle steel steel pipe combination cable termination platform, which is characterized in that include two stand terminal platforms, respectively Independently it is separately mounted to the two sides of dead-end tower, every stand terminal platform includes plural root post and is mounted on the complex root The platform structure face of monoblock type on the upper end of the column face is equipped with several cable terminals and arrester on platform structure face, The a side in platform structure face is provided with the portion 1-2 maintenance ladder.

2. fission self-supporting angle steel steel pipe combination cable termination platform according to claim 1, which is characterized in that described flat Platform structural plane is a kind of grid plate face completely spread.

3. fission self-supporting angle steel steel pipe combination cable termination platform according to claim 1, which is characterized in that described flat Platform structural plane is a kind of riffled iron plate face.

4. fission self-supporting angle steel steel pipe combination cable termination platform according to claim 1, which is characterized in that described vertical Column is constituted using rectangle hollow square tube, and is connect by foundation bolt with ground base.

5. fission self-supporting angle steel steel pipe combination cable termination platform according to claim 1, which is characterized in that described every Cross hang is provided between adjacent two root posts on stand terminal platform.