CN205244661U - Stainless steel joint that is protected from heat - Google Patents

Abstract

The utility model discloses a stainless steel heat-avoiding joint, which comprises a section of stainless steel pipe. The two ends of the stainless steel pipe have a slope from the inner wall to the outer wall. The angle between the slope and the inner wall is 40-60°. The two ends of the stainless steel pipe One of the ends has a larger inner diameter than the other end. The utility model is based on the special-shaped steel welding technology, and adopts stainless steel seamless steel pipes with different anti-corrosion properties as the joints. At the same time, through the design concept of heat avoidance, it better solves the problem of connecting the anti-corrosion steel pipes, thereby greatly prolonging the service life of the anti-corrosion steel pipes. service life. In the design, the design scheme of processing fine threads and grooves on the inner surface of the stainless steel seamless steel pipe is applied, which effectively increases the adhesion and strength of the inner anti-corrosion layer here, and prevents the corrosive medium from penetrating into the weld of special-shaped steel.

Description

A stainless steel heat-avoiding joint

technical field

The utility model relates to the technical field of pipelines, in particular to a stainless steel heat-avoiding joint connection structure used for the connection of anti-corrosion steel pipes.

Background technique

With the rapid development of my country's economy, the amount of anti-corrosion steel pipe is increasing. One of the biggest problems in steel pipe anti-corrosion technology is the connection of pipes. The existing connection methods will destroy the anti-corrosion coating, so there are defects such as unsatisfactory anti-corrosion performance, poor sealing performance, and high cost, which greatly restricts the mass production of anti-corrosion steel pipes. use.

Based on the above reasons, it is necessary to develop a new connection method or structure of anti-corrosion steel pipes.

Utility model content

The main purpose of the utility model is to overcome the defects existing in the connection of the existing steel pipe anti-corrosion pipelines, and provide a stainless steel heat-avoiding joint for the connection of anti-corrosion steel pipes which is moderately priced, can be welded and does not affect the anti-corrosion performance.

The technical scheme of the utility model is:

A stainless steel heat-avoiding joint, comprising a section of stainless steel pipe, characterized in that the two ends of the stainless steel pipe have a slope from the inner wall to the outer wall, the angle between the slope and the inner wall is 40-60°, and the two ends of the stainless steel pipe One of the ends has a larger inner diameter than the other end.

One of the two ends of the stainless steel pipe with a larger inner diameter is provided with a screw thread.

A groove is provided on the inner wall of the end with a larger inner diameter among the two ends of the stainless steel pipe, and the groove is located at the end of the thread.

In the above design, the 40-60° slope is set to facilitate the welding between the stainless steel heat-proof joints of the present invention and the anti-corrosion steel pipe. The end with a larger inner diameter is used to connect with the anti-corrosion steel pipe. The larger inner diameter is convenient Processing of anti-corrosion coating. The setting of the fine thread can make the anti-corrosion coating have a larger surface area, increase the adhesion and strength, and the setting of the groove can separate the anti-corrosion coating area and the non-coated heat-avoiding joint area, preventing welding between heat-avoiding joints Timely damage the anti-corrosion coating area and reduce the erosion of the medium on the steel pipe.

When installing and connecting the anti-corrosion steel pipes, connect the ends with large inner diameters of the two stainless steel heat-avoiding joints to the anti-corrosion steel pipes respectively, and butt-weld the ends with the small inner diameters of the two stainless steel heat-avoiding joints.

The utility model is based on special-shaped steel welding technology, adopts stainless steel seamless steel pipes with different anti-corrosion properties as joints, and at the same time, through the design concept of heat avoidance, it better solves the problem of connecting anti-corrosion steel pipes, thereby greatly prolonging the service life of anti-corrosion steel pipes service life. In the design, the design scheme of processing fine threads and grooves on the inner surface of the stainless steel seamless steel pipe is applied, which effectively increases the adhesion and strength of the inner anti-corrosion layer here, and prevents the corrosive medium from penetrating into the weld of special-shaped steel.

Description of drawings

Figure 1 is a longitudinal sectional view of a stainless steel heat shield joint.

Fig. 2 is a longitudinal sectional view of a stainless steel heat shield joint welded to a seamless steel pipe with anticorrosion on the inner wall.

detailed description

The preferred embodiments of the utility model are given below in conjunction with the accompanying drawings to describe the technical solution of the utility model in detail.

Example:

As shown in Figure 1, the stainless steel heat avoiding joint of the present utility model includes a section of stainless steel pipe 100, the two ends of the stainless steel pipe have a slope 101 from the inner wall 110 to the outer wall 120, the angle between the slope and the inner wall is 60 °, the stainless steel pipe One of the two ends has a larger inner diameter than the other end, and the end with the larger inner diameter is provided with a thread 102 , and a groove 103 is provided on the inner wall at the end of the thread.

The processing and preparation process is as follows: take a section of 130mm stainless steel pipe, process a 60° slope at both ends of each section, and enlarge the inner diameter of one end by 1-2mm within 30mm from the nozzle, and process fine threads on the enlarged surface; Process a groove with a width of 2 mm and a depth of 0.2 mm at the end of the inner surface of the fine thread.

As shown in Figure 2, when the anti-corrosion steel pipe is produced, the end of the enlarged inner diameter of the stainless steel heat-proof joint 100 is welded together with the end of the same-diameter steel pipe 200; the anti-corrosion coating 300 is required to completely cover the weld 400, and all cover the surface of the stainless steel heat-proof joint The thread 102 and the groove 103 at the inner end of the thread, and the parts other than the thread and the groove of the stainless steel heat-proof joint must not have an anti-corrosion coating, so as to ensure that the anti-corrosion coating of the steel pipe is not damaged by the high temperature of electric welding.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. The utility model does not depart from the spirit and scope of the utility model There will also be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model.

Claims (3)

1. the stainless steel joint that is Protected from Heat, comprise one section of stainless-steel pipe, it is characterized in that, the two ends of described stainless-steel pipe have the inclined-plane from inwall to outer wall, the angle of inclined-plane and inwall is at 40-60 °, and the wherein one end at the two ends of described stainless-steel pipe is large compared with the internal diameter of the other end.

2. the stainless steel according to claim 1 joint that is Protected from Heat, is characterized in that having compared with one end of large diameter and be provided with screw thread in the two ends of described stainless-steel pipe.

3. the stainless steel according to claim 2 joint that is Protected from Heat, is characterized in that having compared with the inwall of one end of large diameter and be provided with groove in the two ends of described stainless-steel pipe, and described groove is positioned at the end place of described screw thread.