CN221943609U - A one-meter pipe structure to prevent condensation corrosion - Google Patents

Abstract

A one-meter pipe structure for preventing condensation corrosion, specifically a one-meter pipe structure for preventing condensation corrosion of a vertical coke oven high-gas pipe applied to high-chlorine working conditions. The pipe body comprises a straight pipe and a corrugated section, the straight pipe and the corrugated section are arranged alternately, and a guide ring is arranged on the inner wall of the corrugated section. By setting the one-meter pipe as a structure combining a corrugated pipe and a straight pipe, and arranging a guide ring on the inner wall of the corrugated section, the problem of condensed water remaining in the corrugated section and corroding the corrugated pipe is effectively solved, and the service life of the one-meter pipe is greatly extended.

Description

A one-meter pipe structure to prevent condensation corrosion

Technical Field

The utility model relates to a one-meter pipe structure for preventing condensation corrosion, in particular to a one-meter pipe structure for preventing condensation corrosion of a vertical coke oven high-gas pipe applied in high-chlorine working conditions.

Background Art

The exhaust gas exchange switch of the vertical coke oven system is installed at the port of the small flue of the coke oven. It is composed of a small flue connecting pipe, a lever mechanism, an air door, an exhaust gas weight, a gas weight, a box and a blast furnace gas connecting pipe. It is used to control the gas and air used for heating the coke oven and adjust the suction at the top of the heat storage chamber. The exhaust gas exchange switch is connected to the mixed gas regulating cock through a one-meter pipe. A metal bellows compensator is usually used. Because it is a fully corrugated bellows, blast furnace gas condensate is easily accumulated at the corrugated joint during use. The condensate contains a large amount of chloride ions. Chloride ions are active ions with strong penetration ability. They can be strongly adsorbed by the metal surface, causing the one-meter pipe to be corroded. When the one-meter pipe is corroded, it will cause gas leakage, which poses a great safety hazard. In order to solve the problem of one-meter pipe corrosion caused by the accumulation of gas condensate during the production process, a condensation corrosion prevention structure of a one-meter pipe for high-gas vertical coke oven under high-chlorine conditions is proposed.

Utility Model Content

The purpose of the utility model is to provide a one-meter pipe structure that is resistant to condensation and corrosion in response to the defects or shortcomings in the prior art. By configuring the one-meter pipe as a structure combining a corrugated pipe and a straight pipe, and arranging a guide ring on the inner wall of the corrugated section, the problem of condensed water remaining in the corrugated section and corroding the bellows is effectively solved, thereby greatly extending the service life of the one-meter pipe.

To achieve the above purpose, the utility model adopts the following technical solution: it includes a pipe body 1, the pipe body 1 includes a straight pipe 1-1 and a corrugated section 1-2, the straight pipe 1-1 and the corrugated section 1-2 are arranged alternately, and a guide ring 2 is arranged on the inner wall of the corrugated section 1-2.

Furthermore, the guide ring 2 includes a fixed end 2-1 and a guide end 2-2. The guide end 2-2 is located below the fixed end 2-1, and the outer diameter of the guide end 2-2 is smaller than the outer diameter of the fixed end 2-1.

Furthermore, the fixed end 2-1 is a structure that is larger at the top and smaller at the bottom, and the top opening is connected to the upper end of the bellows 1-2.

Furthermore, the inner wall of the guide ring 2 is coated with a glass flake layer 2-3.

Furthermore, connecting flanges 3 are provided at both ends of the pipe body 1 .

After adopting the above technical scheme, the beneficial effect of the utility model is as follows: by setting the one-meter pipe as a structure combining a corrugated pipe and a straight pipe, and arranging a guide ring on the inner wall of the corrugated section, the problem of condensed water remaining in the corrugated section and corroding the bellows is effectively solved, and the service life of the one-meter pipe is greatly extended.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

Fig. 1 is a schematic diagram of the structure of the utility model;

FIG2 is a schematic diagram of the internal structure of the utility model;

FIG3 is a schematic diagram of the external structure of the guide ring 2 in the utility model;

FIG4 is a schematic diagram of the internal structure of the guide ring 2 in the utility model;

FIG. 5 is a schematic diagram of the enlarged structure of point A in FIG. 4 .

Explanation of the reference numerals: pipe body 1, guide ring 2, connecting flange 3, straight pipe 1-1, corrugated section 1-2, fixed end 2-1, guide end 2-2, glass flake layer 2-3.

DETAILED DESCRIPTION

Referring to Figures 1-5, the technical solution adopted in this specific embodiment is: it includes a pipe body 1, the pipe body 1 includes a straight pipe 1-1 and a corrugated section 1-2, the straight pipe 1-1 and the corrugated section 1-2 are arranged alternately, and the inner wall of the corrugated section 1-2 is provided with a guide ring 2. The traditional one-meter pipe structure is usually a full-wave bellows. The waste exchange switch and the mixed gas regulating cock are connected by a one-meter pipe. Because it is a full-wave bellows, blast furnace gas condensate is easily accumulated at the corrugated section during use. The condensate contains a large amount of chloride ions. Chloride ions are active ions with strong penetration ability and can be penetrated by metal. The strong adsorption on the surface of the metal causes the one-meter pipe to be corroded, causing a safety hazard. Therefore, in this embodiment, the one-meter pipe is set to a structure of alternating straight pipes and corrugated sections, the connecting end is a straight pipe, and the two sections are directly connected to a corrugated section. 254SMo pure austenitic stainless steel is used, and the remaining metal parts are made of 304 stainless steel. The corrugated section can be bent and rotated without affecting the use of the one-meter pipe. At the same time, a guide ring is set on the inner wall of the corrugated section. When condensed water enters, it first flows down the straight pipe and then directly enters the guide ring without passing through the corrugated section. Therefore, it will not accumulate at the corrugated section to cause corrosion to the pipe body, thereby extending the service life of the one-meter pipe.

To be more specific, the guide ring 2 includes a fixed end 2-1 and a guide end 2-2. The guide end 2-2 is located below the fixed end 2-1, and the outer diameter of the guide end 2-2 is smaller than the outer diameter of the fixed end 2-1. The fixed end 2-1 is a structure with a larger top and a smaller bottom. The top opening is connected to the upper end of the bellows 1-2. In order to avoid affecting the activity of the bellows section, the guide ring is set to a structure with a larger top and a smaller bottom. The upper end is a fixed end, which is installed corresponding to the bellows section and needs to be installed at the straight pipe above the arc of the bellows section. The guide end corresponds to the bellows section. Condensate flows in from the opening of the fixed end and flows out from the guide end along the inclined surface. The condensate no longer passes through the bellows section, thereby avoiding the accumulation of corrosive condensate at the bellows section, effectively extending the service life of one meter of pipe.

To be more specific, the inner wall of the guide ring 2 is coated with a glass flake layer 2-3. Since the guide ring is in direct contact with the condensed water and guides the condensed water, the glass flake layer is coated on its inner wall as an anti-corrosion layer, so that the guide ring can function under a variety of harsh working conditions.

More specifically, connecting flanges 3 are provided at both ends of the pipe body 1 .

The working principle of the utility model is as follows: the traditional full-wave bellows structure is replaced by an alternating arrangement of straight pipes 1-1 and corrugated sections 1-2, and a guide ring 2 is arranged at the corrugated section 1-2, which ensures that the corrugated section 1-2 can rotate flexibly, and the condensed water generated by the blast furnace will not accumulate at the corrugated section 1-2, but will flow away from the inner wall of the guide ring 2, and part of it will flow away along the straight pipe 1-1. Since the straight pipe 1-1 and the corrugated section 1-2 are alternately arranged, the condensed water flows down the straight pipe 1-1 and directly enters the guide ring 2, and is finally discharged, thereby effectively reducing the accumulation of corrosive condensed water, and a glass flake layer 2-3 is coated on the inner wall of the guide ring 2 for corrosion protection, which further improves the overall corrosion resistance and extends the service life.

The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims (5)

1. A one-meter pipe structure for preventing condensation corrosion, characterized in that it comprises a pipe body (1), wherein the pipe body (1) comprises a straight pipe (1-1) and a corrugated section (1-2), wherein the straight pipe (1-1) and the corrugated section (1-2) are arranged alternately, and a guide ring (2) is arranged on the inner wall of the corrugated section (1-2). 2. According to the one-meter tube structure for preventing condensation corrosion as described in claim 1, it is characterized in that: the guide ring (2) includes a fixed end (2-1) and a guide end (2-2), the guide end (2-2) is located below the fixed end (2-1), and the outer diameter of the guide end (2-2) is smaller than the outer diameter of the fixed end (2-1). 3. The one-meter tube structure for preventing condensation corrosion according to claim 2 is characterized in that the fixed end (2-1) is a structure with a larger upper portion and a smaller lower portion, and the top opening is connected to the upper end of the corrugated section (1-2). 4. The one-meter tube structure for preventing condensation corrosion according to claim 1 is characterized in that the inner wall of the guide ring (2) is coated with a glass flake layer (2-3). 5. The one-meter tube structure for preventing condensation corrosion according to claim 1 is characterized in that connecting flanges (3) are provided at both ends of the tube body (1).