A symmetrical U-shaped pressure vessel

Abstract

The present invention relates to the technical field of petrochemical equipment, and in particular to a connected symmetrical U-shaped pressure vessel, comprising a left auxiliary cylinder, a main cylinder and a right auxiliary cylinder arranged vertically and sequentially, the front interface and the rear interface of the main cylinder being arranged symmetrically relative to the longitudinal axis of the main cylinder, and the upper ends of the left auxiliary cylinder and the right auxiliary cylinder are respectively provided with upper interfaces. The front interface of the main cylinder and the upper interface of the left auxiliary cylinder are connected through a first elbow, the rear interface of the main cylinder and the upper interface of the right auxiliary cylinder are connected through a second elbow, and the straight line formed by the longitudinal projection of the axis of the first elbow and the second elbow is arranged symmetrically relative to the main cylinder, thereby improving the symmetry of the entire pressure vessel and reducing the vibration caused by the fast flow rate of the medium during operation.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical production equipment, and in particular to a connected symmetrical U-shaped 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 treatment. 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 and the most widely used pressure vessels. In recent years, with the development of petrochemical equipment 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 reaction process has a large amount of material flow, and the medium flow rate is fast, which is easy to cause vibration. According to actual production needs, the inventor has developed the following Figure 1 The undisclosed pressure vessel shown has a structure including a first cylinder 01 and a second cylinder 02 arranged vertically and in parallel, a side interface is provided on the side wall of the upper end of the first cylinder 01, and an upper interface is provided on the upper end of the second cylinder 02, the side interface of the first cylinder 01 and the upper interface of the second cylinder 02 are connected through an elbow 03, the elbow 03 is connected to the side interface of the first cylinder 01 and then extends laterally away from the second cylinder 02, then extends upward and bends, and then downwardly connects 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, and the vibration caused by the fast 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 connected symmetrical U-shaped pressure vessel capable of reducing vibration.

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

[0005] Provided is a connected symmetrical U-shaped pressure vessel, comprising a left auxiliary cylinder, a main cylinder and a right auxiliary cylinder arranged vertically in sequence, a side wall of the upper end of the main cylinder is provided with a front interface and a rear interface, the front interface and the rear interface are symmetrically arranged relative to the longitudinal axis of the main cylinder, and upper ends of the left auxiliary cylinder and the right auxiliary cylinder are respectively provided with upper interfaces;

[0006] The front side interface of the main cylinder body and the upper interface of the left auxiliary cylinder body are connected through a first bent pipe. After the first bent pipe is connected to the front side interface of the main cylinder body, it extends laterally away from the left auxiliary cylinder body, then extends upward, arches and bends, and then connects downward to the upper port of the left auxiliary cylinder body; the rear side interface of the main cylinder body and the upper interface of the right auxiliary cylinder body are connected through a second bent pipe. After the second bent pipe is connected to the rear side interface of the main cylinder body, it extends laterally away from the right auxiliary cylinder body, then extends upward, arches and bends, and then connects downward to the upper port of the right auxiliary cylinder body; the straight line formed by the longitudinal projection of the axes of the first bent pipe and the second bent pipe is symmetrically arranged relative to the main cylinder body.

[0007] Preferably, the first curved pipe and the second curved pipe are both integrally cast structures.

[0008] Preferably, both ends of the first elbow and the second elbow are connected with flanges respectively.

[0009] Preferably, the first elbow and the second elbow are welded and fixed to the main cylinder.

[0010] Preferably, the shape of the cross section of the end of the first curved pipe and / or the second curved pipe gradually changes from circular to non-circular.

[0011] Preferably, the non-circular shape is a semicircle, an ellipse or a polygon.

[0012] Preferably, the front interface and the rear interface are respectively provided with pipe joints, and the inner side walls of the pipe joints are partially tangent to the inner side wall of the main cylinder.

[0013] Preferably, supports are respectively provided on the outer sides of the middle parts of the left auxiliary cylinder body, the main cylinder body and the right auxiliary cylinder body.

[0014] Beneficial effects of the present invention:

[0015] The one-piece symmetrical U-shaped pressure vessel of the present invention comprises a left auxiliary cylinder, a main cylinder and a right auxiliary cylinder arranged vertically in sequence, and the front interface and the rear interface of the main cylinder are symmetrically arranged relative to the longitudinal axis of the main cylinder. The first elbow is connected to the front interface of the main cylinder and then extends laterally in a direction away from the left auxiliary cylinder, then extends upward to bend in an arch, and then connects downward to the upper port of the left auxiliary cylinder. The second elbow is connected to the rear interface of the main cylinder and then extends laterally in a direction away from the right auxiliary cylinder, then extends upward to bend in an arch, and then connects downward to the upper port of the right auxiliary cylinder; the straight line formed by the longitudinal projection of the axis of the first elbow and the second elbow is symmetrically arranged relative to the main cylinder, which improves the symmetry of the entire pressure vessel and can reduce the vibration caused by the fast flow rate of the medium during operation.

[0016] Compared with the traditional single-cylinder pressure vessel, the present invention adds a combined structure of a sub-cylinder and a bent pipe, which has the advantages of balanced force, uniform erosion and corrosion (corrosion resistance, long service life) and expanded production capacity under the same pipe diameter.

[0017] Under the condition of the same production capacity, due to the addition of elbow pipes and auxiliary cylinders, the pipe diameter of each main cylinder or auxiliary cylinder can be reduced. In the case of reduced pipe diameter, the elbow pipes have better flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional view of a pressure vessel for the background art.

[0019] Figure 2 A partial front view of the connected and symmetric U-shaped pressure vessel in the embodiment.

[0020] Figure 3 A sectional view of the connected and symmetric U-shaped pressure vessel in the embodiment.

[0021] Figure 4 A top view of the connected and symmetric U-shaped pressure vessel in the embodiment.

[0022] Figure 1 Reference Signs:

[0023] The first cylinder 01, the second cylinder 02, the elbow pipe 03;

[0024] Figures 2 - 4 Reference Signs:

[0025] The left auxiliary cylinder 1, the main cylinder 2, the right auxiliary cylinder 3, the first elbow pipe 4, the second elbow pipe 5, the pipe joint 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.

[0027] The connected and symmetric U-shaped pressure vessel of this embodiment, as Figures 2 to 4 shown, includes a left auxiliary cylinder 1, a main cylinder 2, and a right auxiliary cylinder 3 that are arranged in sequence and vertically. The upper end side wall of the main cylinder 2 is provided with a front interface and a rear interface, and the front interface and the rear interface are symmetrically arranged with respect to the longitudinal axis of the main cylinder 2. The upper ends of the left auxiliary cylinder 1 and the right auxiliary cylinder 3 are respectively provided with upper interfaces. The front interface of the main cylinder 2 and the upper interface of the left auxiliary cylinder 1 are connected through a first elbow pipe 4. After connecting to the front interface of the main cylinder 2, the first elbow pipe 4 extends horizontally away from the left auxiliary cylinder 1, then extends upward and arches, and then connects downward to the upper port of the left auxiliary cylinder 1. The rear interface of the main cylinder 2 and the upper interface of the right auxiliary cylinder 3 are connected through a second elbow pipe 5. After connecting to the rear interface of the main cylinder 2, the second elbow pipe 5 extends horizontally away from the right auxiliary cylinder 3, then extends upward and arches, and then connects downward to the upper port of the right auxiliary cylinder 3. The longitudinal projection of the axis of the first elbow pipe 4 is a straight line A, and the longitudinal projection of the axis of the second elbow pipe 5 is a straight line B. A and B are symmetrically arranged with respect to the main cylinder 2, improving the symmetry of the entire pressure vessel and being able to reduce the vibration generated by the fast flow rate of the medium during operation.

[0028] Compared with the pressure vessel with a traditional single cylinder body, a combined structure of a secondary cylinder body and an elbow is added in this embodiment. Under the same pipe diameter, it has the advantages of balanced stress, uniform erosion corrosion (anti-corrosion, long service life), and increased production capacity.

[0029] Under the condition of the same production capacity, due to the addition of elbows and the secondary cylinder body, the pipe diameter of each main cylinder body or secondary cylinder body can be reduced. In the case of reduced pipe diameter, the flexibility of the elbow is better.

[0030] In this embodiment, the shape of the end cross-section of the first elbow and / or the second elbow gradually changes from circular to non-circular, such as semi-circular, elliptical rectangular, or other polygons. Because after the fluid passes through the elbow, due to centrifugal force, it is not very uniform, and the flow pattern can be changed by the change of the cross-section of the outlet section to better achieve the swirling centrifugal separation of gas-solid two-phase media.

[0031] In this embodiment, both the first elbow 4 and the second elbow 5 are integrally cast or forged, with a compact and stable structure and high strength.

[0032] In this embodiment, flanges are respectively connected to both ends of the first elbow 4 and the second elbow 5, which is convenient for connection and improves the connection stability. The two ends of the first elbow 4 and the second elbow 5 and the corresponding cylinder body can be changed to be fixed by welding.

[0033] In this embodiment, pipe connectors 6 are respectively provided at the front-side interface and the rear-side interface, and the main cylinder body 2 is connected to the first elbow 4 and the second elbow 5 through different pipe connectors 6. The pipe connector 6 and the main cylinder body 2 are welded and fixed to each other, and the inner side wall of the pipe connector 6 is locally tangent to the inner side wall of the main cylinder body to ensure the smooth flow of the fluid medium and reduce the impact.

[0034] In this embodiment, supports are respectively provided on the outer sides of the middle parts of the left secondary cylinder body 1, the main cylinder body 2, and the right secondary cylinder body 3 for mutual installation and fixation with the outside.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A one-piece symmetrical U-shaped pressure vessel, characterized by: It includes a left auxiliary cylinder body, a main cylinder body, and a right auxiliary cylinder body which are arranged vertically in sequence. The upper end side wall of the main cylinder body is provided with a front side interface and a rear side interface, and the front side interface and the rear side interface are symmetrically arranged relative to the longitudinal axis of the main cylinder body. The upper ends of the left auxiliary cylinder body and the right auxiliary cylinder body are respectively provided with upper interfaces; The front side interface of the main cylinder body and the upper interface of the left auxiliary cylinder body are connected through a first elbow pipe. After the first elbow pipe is connected to the front side interface of the main cylinder body, it extends horizontally away from the left auxiliary cylinder body, then extends upward and arches and bends, and then extends downward to connect to the upper port of the left auxiliary cylinder body. The rear side interface of the main cylinder body and the upper interface of the right auxiliary cylinder body are connected through a second elbow pipe. After the second elbow pipe is connected to the rear side interface of the main cylinder body, it extends horizontally away from the right auxiliary cylinder body, then extends upward and arches and bends, and then extends downward to connect to the upper port of the right auxiliary cylinder body. The straight line formed by the longitudinal projection of the axes of the first elbow pipe and the second elbow pipe is symmetrically arranged relative to the main cylinder body; The shape of the end cross-section of the first elbow pipe and / or the second elbow pipe gradually changes from circular to non-circular; Pipe joints are respectively provided at the front side interface and the rear side interface, and the inner side walls of the pipe joints are locally tangent to the inner side wall of the main cylinder body.

2. The one-piece symmetrical U-shaped pressure vessel according to claim 1, characterized in that: Both the first elbow pipe and the second elbow pipe are integrally cast and formed structures.

3. A kind of integral symmetric U-shaped pressure vessel according to claim 1, characterized in that: Flanges are respectively connected to both ends of the first elbow pipe and the second elbow pipe.

4. The one-piece symmetrical U-shaped pressure vessel according to claim 1 is characterized in that: The first elbow pipe and the second elbow pipe are fixedly welded to the main cylinder body.

5. The one-piece symmetrical U-shaped pressure vessel according to claim 1 is characterized in that: The non-circular shape is a semi-circular shape, an elliptical shape, or a polygonal shape.

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

Images