A U-shaped connected pressure vessel

Abstract

The present invention relates to the technical field of petrochemical equipment, and specifically to a U-shaped connected pressure vessel, comprising a main cylinder and three auxiliary cylinders arranged vertically, wherein the three auxiliary cylinders are evenly distributed around the circumference of the main cylinder and are spaced apart from the main cylinder, the side wall of the upper end of the main cylinder is provided with three side interfaces, the three side interfaces are evenly distributed around the longitudinal axis of the main cylinder, and the side interfaces are staggered with the auxiliary cylinders, and the upper ends of the three auxiliary cylinders are respectively provided with upper interfaces; the three side interfaces of the main cylinder and the upper interfaces of the three auxiliary cylinders are connected to each other through different elbows, and the elbows are connected to the side interfaces of the main cylinder and extend laterally away from the corresponding auxiliary cylinders, then extend upward and bend, and then connect downward to the upper ports of the corresponding auxiliary cylinders. This makes the three auxiliary cylinders and the three elbows highly symmetrical in space, more stable in structure, and can reduce vibration caused by the fast flow rate of the medium in the elbows during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of petrochemical production equipment, in particular to a U-shaped connected pressure vessel. Background Art

[0002] A pressure vessel refers to a closed device that contains gas or liquid and bears a certain pressure. Pressure vessels are widely used in many fields such as petroleum, chemical industry, aerospace, and medical care. It is divided into low-pressure vessels, medium-pressure vessels, high-pressure vessels, and ultra-high-pressure vessels according to the level of pressure it can withstand. Vertical pressure vessels are more common among pressure vessels and are the most widely used. In recent years, as petrochemical plants have developed towards large-scale production, the volume of reactors has become larger and the height has become higher. With the increase in the diameter of the container and the scale of production, the material flow rate of the reaction process is large, and the medium flow rate is fast, which is easy to cause vibration. According to actual production needs, the inventors have developed the following Figure 1 The undisclosed pressure vessel shown has a structure comprising a first cylinder 01 and a second cylinder 02 arranged vertically and side by side. The upper end sidewall of the first cylinder 01 is provided with a side port, and the upper end of the second cylinder 02 is provided with an upper port. The side port of the first cylinder 01 and the upper port of the second cylinder 02 are connected by an elbow 03. After connecting to the side port of the first cylinder 01, the elbow 03 extends laterally away from the second cylinder 02, then extends upward, arches, and bends, and then connects downward to the upper port of the second cylinder 02. As can be seen from the above, the elbow 03 increases the asymmetry of the entire device, making the structure unstable, and the vibration caused by the high flow rate of the medium during operation is more obvious. Summary of the Invention

[0003] In view of the above technical problems in the prior art, the present invention provides a U-shaped connected pressure vessel with a stable structure and the ability to reduce vibration.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] Provided is a U-shaped connected pressure vessel, comprising a main cylinder body and three auxiliary cylinder bodies arranged upright, the three auxiliary cylinder bodies being evenly distributed around the circumference of the main cylinder body and having a distance between them and the main cylinder body, the side wall of the upper end portion of the main cylinder body being provided with three side interfaces, the three side interfaces being evenly distributed around the longitudinal axis of the main cylinder body, the side interfaces being staggered with the auxiliary cylinder bodies, and the upper ends of the three auxiliary cylinder bodies being respectively provided with upper interfaces; the three side interfaces of the main cylinder body and the upper interfaces of the three auxiliary cylinder bodies being connected to each other via different bent pipes, the bent pipes being connected to the side interfaces of the main cylinder body and extending laterally away from the corresponding auxiliary cylinder body, then extending upward to arch and bend, and then downward to connect to the upper ports of the corresponding auxiliary cylinder bodies.

[0006] Preferably, the bent pipes are all integrally cast structures.

[0007] Preferably, the elbow is fixed to the main cylinder by welding or by a flange.

[0008] Preferably, the shape of the cross section of the end portion of the elbow gradually changes from circular to non-circular.

[0009] Preferably, the non-circular shape is a semicircle, an ellipse or a polygon.

[0010] Preferably, the three side interfaces are respectively provided with pipe joints, the main cylinder body and the elbow are connected via the pipe joints, and the inner side walls of the pipe joints are partially tangent to the inner side walls of the main cylinder body.

[0011] Preferably, supports are respectively provided on the outer sides of the middle parts of the main cylinder and the auxiliary cylinder.

[0012] Beneficial effects of the present invention:

[0013] In the U-shaped connected pressure vessel of the present invention, the three auxiliary cylinders are evenly distributed around the circumference of the main cylinder, and the three side interfaces of the main cylinder are evenly distributed around the longitudinal axis of the main cylinder, and the side interfaces are staggered with the auxiliary cylinders. In this way, the three auxiliary cylinders and the three elbows are highly symmetrical in space, the structure is more stable, and the vibration caused by the fast flow rate of the medium in the elbow during operation can be reduced.

[0014] Compared with the traditional single-cylinder pressure vessel, the present invention adds a connected structure of a sub-cylinder and a bend pipe. Under the same pipe diameter, it has the advantages of balanced force, uniform erosion and corrosion (corrosion resistance, long service life) and expanded production capacity.

[0015] Under the same production capacity, the diameter of each main cylinder or auxiliary cylinder can be reduced due to the addition of elbows and auxiliary cylinders. When the diameter is reduced, the elbow flexibility is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of a pressure vessel according to background technology.

[0017] Figure 2 Schematic diagram of the structure of the U-shaped connected pressure vessel in the embodiment, with the cross section of the elbow being shown.

[0018] Figure 3 A schematic top view of a U-shaped connected pressure vessel in an embodiment

[0019] Figure 1 Reference numerals:

[0020] First cylinder 01, second cylinder 02, elbow 03;

[0021] Figure 2-Figure 3 Reference numerals:

[0022] Main cylinder 1, auxiliary cylinder 2, elbow 3, pipe joint 4. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to specific embodiments and accompanying drawings.

[0024] The U-shaped connected pressure vessel of this embodiment is as follows Figure 2 and Figure 3 As shown, it includes a main cylinder body 1 and three auxiliary cylinder bodies 2 arranged upright. The three auxiliary cylinder bodies 2 are evenly distributed around the circumference of the main cylinder body 1 and are spaced apart from the main cylinder body 1. The side wall of the upper end of the main cylinder body 1 is provided with three side interfaces. The three side interfaces are evenly distributed around the longitudinal axis of the main cylinder body 1, and the side interfaces are staggered with the auxiliary cylinder bodies 2. The upper ends of the three auxiliary cylinder bodies 2 are respectively provided with upper interfaces. The three side interfaces of the main cylinder body 1 and the upper interfaces of the three auxiliary cylinder bodies 2 are connected through different elbows 3. After the elbows 3 are connected to the side interfaces of the main cylinder body 1, they extend laterally away from the corresponding auxiliary cylinder body 2, then extend upward and bend, and then connect downward to the upper end of the corresponding auxiliary cylinder body 2. In this way, the three auxiliary cylinder bodies 2 and the three elbows 3 are highly symmetrical in space, the structure is more stable, and the vibration caused by the fast flow rate of the medium in the elbows during operation can be reduced.

[0025] Compared with the traditional single-cylinder pressure vessel, the present embodiment is provided with a combined structure of a secondary cylinder and a bent pipe. Under the same pipe diameter, it has the advantages of balanced force, uniform erosion and corrosion (corrosion resistance, long service life) and expanded production capacity.

[0026] Under the same production capacity, the diameter of each main cylinder or auxiliary cylinder can be reduced due to the addition of elbows and auxiliary cylinders. When the diameter is reduced, the elbow flexibility is better.

[0027] In this embodiment, the cross-sectional shape of the end of the elbow 3 gradually changes from a circular shape to a non-circular shape, such as a semicircular shape, an elliptical shape, a rectangular shape, or another polygonal shape. Because the fluid is no longer perfectly uniform after passing through the elbow due to centrifugal action, the change in the cross-sectional shape of the outlet section can be used to change the flow pattern, thereby better achieving cyclonic centrifugal separation of gas-solid two-phase media.

[0028] Preferably, the elbow 3 is an integrally cast structure or a forged structure, which is compact, stable and has high strength. The elbow 3 is fixed to the main cylinder 1 by welding or by a flange.

[0029] Preferably, the three side interfaces of the main cylinder 1 are each provided with a pipe joint 4, the axis of the pipe joint 4 being offset from the radial direction of the main cylinder 1. The main cylinder 1 and the elbow 3 are connected via different pipe joints 4, and the inner sidewalls of the pipe joints 4 are partially tangential to the inner sidewall of the main cylinder 1. The pipe joints 4 and the main cylinder 1 are welded together to ensure smooth flow of the fluid medium and reduce impact.

[0030] Preferably, supports are respectively provided on the outer sides of the middle parts of the main cylinder body 1 and the auxiliary cylinder body 2 for mounting and fixing to the outside.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A U-shaped one-piece pressure vessel, characterized by: The main cylinder comprises a main cylinder body and three auxiliary cylinder bodies arranged vertically, the three auxiliary cylinder bodies being evenly distributed around the circumference of the main cylinder body and spaced apart from the main cylinder body; the side wall of the upper end portion of the main cylinder body is provided with three side interfaces, the three side interfaces being evenly distributed around the longitudinal axis of the main cylinder body, and the side interfaces being staggered with the auxiliary cylinder bodies; the upper ends of the three auxiliary cylinder bodies are respectively provided with upper interfaces; the three side interfaces of the main cylinder body and the upper interfaces of the three auxiliary cylinders are respectively connected by different elbows, the elbows being connected to the side interfaces of the main cylinder body and extending laterally away from the corresponding auxiliary cylinder body, then extending upward, arching and bending, and then downwardly connecting to the upper ports of the corresponding auxiliary cylinders; The cross-sectional shape of the end portion of the elbow gradually changes from circular to non-circular; The three side interfaces are respectively provided with pipe joints, the main cylinder body and the elbow are connected through the pipe joints, and the inner side walls of the pipe joints are partially tangent to the inner side wall of the main cylinder body.

2. The U-shaped connected pressure vessel according to claim 1, characterized in that: The elbows are all integrally cast structures.

3. The U-shaped connected pressure vessel according to claim 1, characterized in that: The elbow is fixed to the main cylinder by welding or by flanges.

4. The U-shaped connected pressure vessel according to claim 1, characterized in that: The non-circular shape is a semicircle, an ellipse or a polygon.

5. The U-shaped connected pressure vessel according to claim 1, characterized in that: Supports are respectively provided on the outer sides of the middle parts of the main cylinder body and the auxiliary cylinder body.

Images