CN211396853U - Be used for steel pipe concrete structure transmission of electricity high tower flange leak protection thick liquid construction structures - Google Patents

Abstract

The utility model discloses a be used for steel pipe concrete structure transmission of electricity high tower flange leak protection thick liquid construction structure, include a plurality of steel pipe joints that dock in proper order along transmission of electricity high tower height direction, the inside of steel pipe joint is poured into self-compaction concrete, the upper and lower both ends of steel pipe joint are equipped with flange, and two adjacent steel pipe joints are through flange butt joint and adopt the bolt-up, flange is including corresponding the outer ring portion that is located the inner ring portion of steel pipe joint pipe wall inboard position and is located steel pipe joint pipe wall outside position, inner ring portion distribute along circumference have with bolt complex internal thread hole, outer ring portion distribute along circumference have with bolt complex external screw thread hole, inner ring portion and outer ring portion meet the position and beat and be equipped with sealed glue. The utility model discloses beat between including, the outer screwed hole and be equipped with sealed glue, form in succession and confined sealed gluey packing ring to the prevention self-compaction concrete that fills passes through the flange seepage.

Description

A kind of construction structure of anti-leakage slurry for transmission tower flange of concrete-filled steel tubular structure

technical field

The utility model relates to the field of power transmission line engineering construction, in particular to the construction technology of a high power transmission tower with a concrete-filled steel tube structure.

Background technique

In the structural design of the transmission tower, the CFST structure transmission tower is generally only used for the spanning tower with large downward pressure and upward pulling load. When the steel pipe is used as the main material for the CFST structure transmission tower, the conditions and requirements of the structure force, material supply, tower manufacturing, supply and transportation, and on-site installation need to be comprehensively considered. Therefore, the main column steel pipe is usually hoisted in sections and sections, and each section of the main steel pipe is flanged up and down.

Usually, the main function of the steel pipe structure of the transmission tower is to meet the structural bearing capacity, and a certain deviation is allowed for the processing of the steel structure (for example, the flange connection gap is not greater than 2mm, and the flange faces the axis with an inclination of 1.5-3mm). It is not possible to carry out special sealing design in flange joints and other parts like other industrial pipelines; for the gaps in flange joints and other parts, due to the stress of the overall structure of the tower and the anti-corrosion durability, methods such as welding and plugging are not allowed. . As a result, there will be a certain gap at the flange connection of the CFST structure transmission tower, and this gap is within the allowable error range of the process.

In addition, because the concrete-filled steel tubular structure power transmission tower needs to pay attention to the self-compacting concrete in the main column steel pipe, and the self-compacting and pumping requirements of the concrete-filled steel tubular structure determine its high fluid characteristics. During the pouring process, it is affected by the large height difference and high pressure , The cement mortar must be drilled if there are holes, and leaks if there are seams.

These two reasons lead to the problem of flange leakage during the grouting construction of the CFST transmission tower. Flange slurry leakage will cause pollution of the outer wall of the supervisor, cover the aviation marking paint on the outer wall of the tower, be difficult to clean (can only be cleaned manually) and even delay the construction period.

Utility model content

The technical problem to be solved by the utility model is to provide an anti-leakage slurry construction structure for the transmission tower flange of the CFST structure, which can effectively control the slurry leakage of the steel pipe flange and ensure the construction of the CFST structure transmission tower.

In order to solve the above-mentioned technical problems, the present utility model adopts the following technical scheme: a construction structure for anti-leakage slurry construction of a high power transmission tower flange of a concrete-filled steel tube structure, comprising a plurality of steel pipe joints connected in sequence along the height direction of the high power transmission tower, the steel pipe joints The interior of the steel pipe section is filled with self-compacting concrete, the upper and lower ends of the steel pipe section are provided with connecting flanges, and the two adjacent steel pipe sections are connected by the connecting flanges and fastened with bolts. The inner ring part at the inner side and the outer ring part at the outer side of the pipe wall of the steel pipe section, the inner ring part is distributed along the circumferential direction with the inner threaded holes matched with the bolts, and the outer ring part is distributed along the circumferential direction with the bolts matched The outer threaded hole of the inner ring part and the outer ring part are connected with sealant, so that a continuous and closed sealant filling ring is formed between the inner and outer threaded holes to prevent the poured self-compacting concrete from passing through. Connection flange leaks.

Optionally, the sealant filling ring has a width of 1 (±0.1) cm and a thickness of at least 0.5 cm.

Optionally, the sealant is a weather-resistant silicone sealant.

Optionally, the connecting flange is provided with reinforcing ribs.

Optionally, the inner threaded hole and the outer threaded hole are staggered along the circumferential direction of the connecting flange.

The technical scheme adopted by the utility model is that sealant is drilled between the inner and outer threaded holes to form a continuous and closed sealant filling ring to prevent the poured self-compacting concrete from leaking through the connecting flange.

Therefore, it has the following beneficial effects:

With a simple, economical, safe and efficient method, on the premise of not changing the main structure of the high power transmission tower, it can solve the important problems in the construction process of the high tower assembly, which can effectively reduce the leakage rate of the steel pipe flange of the high power transmission tower and improve the Construction quality of high power transmission towers with CFST structure.

The specific technical solutions adopted by the present invention and the beneficial effects brought by it will be disclosed in detail in the following specific embodiments in conjunction with the accompanying drawings.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described:

Fig. 1 is the top view of the utility model connecting flange;

Fig. 2 is the schematic diagram of the upper part of the steel pipe section of the utility model;

FIG. 3 is an enlarged schematic view of the structure at A of FIG. 2 .

Detailed ways

The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, not all. Based on the examples in the implementation manner, other examples obtained by those skilled in the art without creative work, all belong to the protection scope of the present invention.

It can be understood by those skilled in the art that the features in the following embodiments and implementations can be combined with each other without conflict.

The terms used in the present invention are for the purpose of describing particular embodiments only, and are not intended to limit the present invention. For example, the following words "upper", "lower", etc. indicating the orientation or positional relationship are only based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that The device/element must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as a limitation of the present invention.

Referring to Figures 1 to 3, a construction structure for leakage-proof slurry construction of a high power transmission tower flange of a concrete-filled steel tube structure includes a plurality of steel pipe sections 1 connected in sequence along the height direction of the power transmission tower, and the interior of the steel pipe section is filled with Self-compacting concrete, the upper and lower ends of the steel pipe section are provided with connecting flanges 10, and two adjacent steel pipe sections are butted by the connecting flanges and fastened with bolts. The inner ring portion 11 and the outer ring portion 12 located on the outer side of the pipe wall of the steel pipe section, the inner ring portion is circumferentially distributed with internally threaded holes that cooperate with the bolts, and the outer ring portion is circumferentially distributed with the bolts matching. Externally threaded holes, the inner ring part and the outer ring part are connected with sealant, so as to form a continuous and closed sealant filling ring 13 between the inner and outer threaded holes to prevent the poured self-compacting concrete from passing through Connection flange leaks.

Preferably, the sealant filling ring has a width of 1 (±0.1) cm and a thickness of at least 0.5 cm. To ensure that the sealing requirements are met.

The sealant selected in this embodiment is a weather-resistant silicone sealant. Mainly used as a filler for the gap between the main connecting nodes. It is a one-component, neutral curing colloid with good weather resistance and waterproof sealing. It can be easily extruded and used in a wide range of temperature conditions, and is cured into excellent, durable elastic silicone rubber by moisture in the air. The following characteristics need to be met:

(1) Neutral curing: suitable for most building materials without adverse reactions or corrosion;

(2) Excellent adhesion: no primer is required, and it can form strong adhesion with most building materials;

(3) Excellent weather resistance: sunlight, rain, ice and snow, ozone and high and low temperature will not cause adverse effects;

(4) Medium and high modulus: It can carry the expansion and displacement capacity of the interface ±25%.

To ensure that the sealant used must be a weather-resistant silicone sealant that meets the above performance requirements, so as to ensure sufficient elasticity and sealing performance.

Referring to FIG. 2 , in order to improve the structural strength of the flange, the connecting flange is provided with a reinforcing rib 14 .

In addition, the inner threaded holes and the outer threaded holes are staggered along the circumferential direction of the connection flange to improve connection strength and reliability.

During construction, the sealant is evenly placed on the ground between the inner and outer threaded holes of the main pipe flange to form a continuous and closed filling.

Allow the sealant to cure for 2 hours at room temperature before proceeding to the main lift.

When the main pipe flange is connected, the bolt tightening process adopts the diagonal tightening method to ensure that the flanges are connected tightly.

The utility model adopts a simple, economical, safe and high-efficiency method, without changing the main structure of the high-power transmission tower, to solve the important problems in the construction process of the high-tower assembly, and can effectively reduce the leakage of the steel pipe flange of the high-power transmission tower rate, and improve the construction quality of high power transmission towers with CFST structure.

The typical applications of the CFST structure power transmission tower are the two-base 370m spanning tower of the 220kV Zhoushan and mainland interconnection transmission line project and the 380m transmission tower of the 500kV Zhoushan interconnection project. The pulp rate reaches 44.6%, while the pulp leakage rate of the 380-meter-high tower after the utility model is applied is only 3.13%. Through the actual inspection, it is proved that the utility model can solve the important problems in the construction process of high tower assembly by a simple, economical, safe and efficient method.

The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to the accompanying drawings and the above specific embodiments. content described in. Any modifications that do not depart from the functional and structural principles of the present invention are intended to be included in the scope of the claims.

Claims (5)

1. The utility model provides a be used for steel pipe concrete structure transmission of electricity high tower flange leak protection thick liquid construction structure, includes a plurality of steel pipe sections that dock in proper order along transmission of electricity high tower height direction, the inside of steel pipe section is poured into self-compaction concrete, the upper and lower both ends of steel pipe section are equipped with flange, and two adjacent steel pipe sections pass through flange butt joint and adopt bolt-up, its characterized in that: flange is including corresponding the outer ring portion that is located the interior ring portion of steel pipe section pipe wall inboard position and is located steel pipe section pipe wall outside position, interior ring portion distribute along circumference have with bolt complex internal thread hole, outer ring portion distribute along circumference have with bolt complex external screw thread hole, interior ring portion and outer ring portion meet the position and beat and be equipped with sealed glue to form continuous and confined sealed glue packing ring between inside and outside screw thread hole, pass through the flange seepage with the self-compaction concrete that prevents to pour.

2. The leakage-proof construction structure for the flange of the steel pipe concrete structure power transmission high tower according to claim 1, wherein: the width of the sealant filling ring is 1 plus or minus 0.1 cm, and the thickness of the sealant filling ring is at least 0.5 cm.

3. The leakage-proof construction structure for the flange of the steel pipe concrete structure power transmission high tower according to claim 1, wherein: the sealant is weather-resistant silicone sealant.

4. The leakage-proof construction structure for the flange of the steel pipe concrete structure power transmission high tower according to claim 1, wherein: the connecting flange is provided with a reinforcing rib.

5. The leakage-proof construction structure for the flange of the steel pipe concrete structure power transmission high tower according to claim 1, wherein: the internal thread hole and the external thread hole are arranged in a staggered mode along the circumferential direction of the connecting flange.

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