CN210240860U - Pressure-reducing oil transfer line low-speed section pipeline - Google Patents

Abstract

The utility model relates to a low-speed pipeline of a pressure-reducing oil transfer line, which comprises a low-speed pipeline, a plurality of high-speed pipelines and a sealing head; one end of the low-speed section pipeline is provided with an end socket connecting part for welding an end socket, and a first groove is formed in the end socket connecting part; a plurality of special-shaped flanging parts are symmetrically arranged on the low-speed section pipeline along the horizontal direction, and the gradient of the special-shaped flanging parts is gradually reduced by 4 per mill towards the direction of a connecting end connected with an external pipeline; second grooves are arranged on the upper end faces of the special-shaped flanging parts; the bottoms of the high-speed section pipelines are provided with third grooves matched with the second grooves on the corresponding special-shaped flanging parts, and the second grooves and the third grooves form welding grooves; one end of the seal head is provided with a welding part, a fourth groove is formed in the welding part, and the seal head is fixed on the seal head connecting part through welding. The utility model discloses a decompression changes oily line low-speed section pipeline through set up special-shaped turn-ups portion on low-speed section pipeline, effectively guarantees welded quality, has improved the intensity and the life of pipeline.

Description

Pressure-reducing oil transfer line low-speed section pipeline

Technical Field

The utility model relates to a metal pipe fitting technical field, especially a decompression changes oil line low-speed section pipeline.

Background

The atmospheric and vacuum distillation of crude oil is an important process in the oil refining industry, and the atmospheric and vacuum distillation unit has the characteristics of large processing amount, multiple product varieties, wide influence on downstream production devices and the like, and occupies a core position in the oil refining industry. The atmospheric and vacuum distillation is the combination of atmospheric distillation and vacuum distillation, and basically belongs to a physical process. The atmospheric and vacuum distillation is mainly realized by a rectification process, and separation is realized on a tower plate or a filler according to different relative volatilities of components under the conditions of normal pressure and reduced pressure. Gas-liquid two phases are reversely contacted, transferred by mass and heat, and subjected to multiple vaporization and condensation, so that gasoline, coal and diesel fractions in the crude oil are cut out to produce qualified gasoline, kerosene, diesel oil, wax oil, residual oil and the like. The level of the atmospheric and vacuum distillation technology has great influence on the product quality and yield of an oil refinery and the effective utilization rate of crude oil. The reduced pressure oil transfer line is used as an important component of a pressure reduction unit in crude oil distillation, and has great significance for stable operation of a pressure reduction device, reduced pressure deep drawing, oil product quality improvement and energy conservation.

The reduced pressure oil transfer line is a key pipeline of the atmospheric and vacuum distillation device, and is large in diameter and operated under high-temperature negative pressure, so that the pressure drop and the temperature drop of a piping system are required to be small, and meanwhile, the reduced pressure oil transfer line is corroded by sulfides and naphthenic acid in crude oil, and the design needs to consider stress, thermal compensation, materials, vibration, support arrangement and the like, and the requirements of uniform flow of media in multiple paths of pipes and maintenance and overhaul of the oil transfer line are met.

Chinese utility model patent with publication number CN202643640U discloses a large-caliber two-phase flow pressure-reducing oil transfer line device, which comprises a low-speed section pipeline and a plurality of high-speed section pipelines which are led out from a pressure-reducing furnace and inserted into the low-speed section pipeline, wherein the low-speed section pipeline is arranged along the horizontal direction and gradually lifted with a gradient of 2-3 per mill towards the pressure-reducing furnace, the high-speed section pipeline is composed of a vertical pipe connected with the pressure-reducing furnace, an inclined pipe inserted into the low-speed section pipeline and an elbow connected with the vertical pipe and the inclined pipe, and the included angle between the intersection plane of the axis of the inclined pipe and the axis of the low-speed section pipeline and the vertical direction is more than or equal to 0 degree and less than or equal to 90 degrees; the included angle between the axis of the inclined pipe and the axis of the low-speed section pipeline is more than or equal to 30 degrees and less than or equal to 90 degrees. Has low temperature drop and pressure drop, excellent stress and vibration damping performance, and is favorable for the stable, safe and long-period operation of the device. However, since the joint between the low-speed pipeline and the high-speed pipeline is normally connected by welding, the pressure that can be borne by the weld is relatively small, and the above patent does not disclose the structure of the weld between the high-speed pipeline and the low-speed pipeline and how to ensure the strength of the weld.

In view of the above problems, it is desirable to provide a reduced-pressure transfer line low-speed section pipe.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a decompression changes oily line low-speed section pipeline through set up special-shaped turn-ups portion on low-speed section pipeline, effectively guarantees welded quality, has improved the intensity and the life of pipeline.

In order to achieve the purpose of the utility model, the low-speed section pipeline of the pressure-reducing oil transfer line comprises a low-speed section pipeline, a plurality of high-speed section pipelines and a sealing head, wherein the number of the high-speed section pipelines is an even number;

one end of the low-speed section pipeline is provided with a connecting end for connecting an external pipeline, the other end of the low-speed section pipeline is provided with an end socket connecting part for welding an end socket, and the end socket connecting part is provided with a first groove; a plurality of special-shaped flanging parts are symmetrically arranged on the low-speed section pipeline along the horizontal direction, and the special-shaped flanging parts gradually decrease with a gradient of 4 per mill towards the direction of a connecting end connected with an external pipeline; the upper end surfaces of the special-shaped flanging parts are consistent with the cross section shape of the high-speed section pipeline to be connected, and second grooves are formed in the upper end surfaces of the special-shaped flanging parts;

the bottoms of the high-speed section pipelines are provided with third grooves matched with the second grooves on the corresponding special-shaped flanging parts, the second grooves and the third grooves form welding grooves, and the high-speed section pipelines are fixed on the special-shaped flanging parts through welding;

one end of the seal head is provided with a welding part, a fourth groove is arranged on the welding part and is matched with the first groove, the seal head is fixed on the seal head connecting part through welding, and the other end of the seal head is provided with an arc-shaped surface.

Preferably, the low-speed section pipeline is provided with a manhole flanging part, the manhole flanging part is provided with a flange seat through welding, the flange seat is used for fixing the manhole cover through bolts, and a sealing ring is arranged at the joint of the flange seat and the manhole cover.

Preferably, the welding position of the end socket and the connecting part of the end socket is fixedly provided with a circle of first reinforcing ring through welding.

Preferably, the high-speed pipeline is a seamless pipeline, and the low-speed pipeline is a slotted pipeline.

Preferably, a plurality of second reinforcing rings are arranged on the outer wall of the low-speed section pipeline at equal intervals.

Preferably, the low-speed end pipeline is provided with two placing racks through welding, and the placing racks are fixed on the ground through bolts.

Preferably, the number of the high-speed section pipes is 4, and the number of the special-shaped turning parts is 4.

The working principle is as follows: the special-shaped flanging parts are horizontally and symmetrically arranged on the low-speed section pipeline, so that a plurality of welded high-speed section pipelines are also symmetrically arranged on the low-speed section pipeline, according to the fluid mechanics principle, a medium in the high-speed section pipeline impacts the pipe wall of the low-speed section pipeline, the pipe wall of the low-speed section pipeline is abraded, the safety of an oil transfer line is influenced after long-term operation, and the impact of two strands of media is oppositely impacted by the inventor through symmetrical arrangement, so that the impact strength is reduced, and the vibration caused by impact jet flow is weakened;

the utility model discloses a general decompression of flue gas stream changes oil line low-speed section pipeline because high-speed section pipeline reduces with 4 thousandth slope gradually along the horizontal direction to the link of connecting outside pipeline, has reduced the impact of medium to low-speed section pipeline, and 4 thousandth is the best data that are obtained through long-time experiment, has both guaranteed certain velocity of flow, and is less relatively to the impact of low-speed section pipeline simultaneously, and the comprehensive consideration is best.

The utility model relates to a decompression changes oil line low-speed section pipeline compares with prior art and has following advantage:

(1) the special-shaped flanging parts are arranged on the low-speed section pipeline, so that a worker can more conveniently weld the pipeline, and the welding strength is effectively ensured;

(2) the high-speed section pipeline is a seamless pipeline, the low-speed section pipeline is a seamed pipeline, the processing speed is improved, and the outer wall of the low-speed section pipeline is provided with a plurality of second reinforcing rings at equal intervals, so that the strength of the low-speed section pipeline is effectively ensured;

(3) in order to facilitate the maintenance of workers, a manhole flanging part is arranged on the low-speed section pipeline, a flange seat is arranged on the manhole flanging part through welding, a manhole cover is fixed on the flange seat through bolts, when the maintenance is carried out, the workers can open the manhole cover through dismounting the bolts to maintain, and a sealing ring is arranged at the joint of the flange seat and the manhole cover so as to ensure the sealing property of the pipeline.

Drawings

FIG. 1 is a schematic structural view of a low-speed section pipeline;

FIG. 2 is an enlarged fragmentary view of the second contoured cuff portion of FIG. 1;

figure 3 is an enlarged partial view of the manhole turn-up in figure 1;

FIG. 4 is an enlarged view of a portion of the header connection of FIG. 1;

FIG. 5 is a schematic structural view of the head;

FIG. 6 is a schematic structural diagram of a low-speed section pipeline of a pressure-reducing oil transfer line without a mounting flange seat;

FIG. 7 is a schematic view of the connection between the sealing head and the connecting portion of the sealing head in FIG. 6;

fig. 8 is a schematic structural view of a low-speed section pipeline of the pressure-reducing oil transfer line of the present invention;

FIG. 9 is an enlarged view of a portion of the flange seat of FIG. 8 in connection with a manhole flange;

fig. 10 is a partial connection sectional view of a high-speed stage pipe and a low-speed stage pipe.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Examples

A low-speed section pipeline of a pressure reduction oil transfer line comprises a low-speed section pipeline 1, a plurality of high-speed section pipelines and end sockets 12, wherein the number of the high-speed section pipelines is even;

as shown in fig. 1-10, one end of the low-speed pipeline 1 is provided with a connecting end 2 for connecting an external pipeline, the other end of the low-speed pipeline 1 is provided with an end enclosure connecting part 8 for welding an end enclosure 12, and the end enclosure connecting part 8 is provided with a first groove 11; the low-speed section pipeline 1 is symmetrically provided with a plurality of special-shaped flanging parts along the horizontal direction, the slope of the special-shaped flanging parts gradually decreases by 4 per thousand towards the connecting end connected with the external pipeline, and the arrangement mainly considers that the slope of the special-shaped flanging parts is smaller closer to the connecting end 2 connected with the external pipeline along the horizontal direction, the flow rate of a medium is lower, and finally the medium tends to be consistent; the upper end surfaces of the special-shaped flanging parts are consistent with the cross section shape of the high-speed section pipeline to be connected, and second grooves 9 are arranged on the upper end surfaces of the special-shaped flanging parts;

in order to facilitate the maintenance of workers, a manhole flanging part 5 is arranged on the low-speed section pipeline 1, a flange seat 19 is welded on the manhole flanging part 5, a manhole cover 20 is fixed on the flange seat 19 through bolts, and when the maintenance is performed, the workers can open the manhole cover 20 by detaching the bolts to perform maintenance; in order to ensure the sealing performance of the pipeline, a sealing ring is arranged at the joint of the flange seat 19 and the manhole cover 20;

the bottoms of the high-speed section pipelines are provided with third grooves matched with the second grooves 9 on the corresponding special-shaped flanging parts, the second grooves 9 and the third grooves form welding grooves, and the high-speed section pipelines are fixed on the special-shaped flanging parts by welding;

it should be explained here that, since the special-shaped flanging portions are horizontally and symmetrically arranged on the low-speed pipeline 1, a plurality of welded high-speed pipelines are also symmetrically arranged on the low-speed pipeline, according to the fluid mechanics principle, the medium in the high-speed pipeline impacts the pipe wall of the low-speed pipeline, so that the pipe wall of the low-speed pipeline is abraded, the safety of the oil transfer line is affected after long-term operation, and the inventor makes impact of two streams of media impact opposite impact through the symmetrical arrangement, so as to reduce the impact strength, and further weaken the vibration caused by impact jet.

One end of the end socket 12 is provided with a welding part 14, the welding part 14 is provided with a fourth groove 15, the fourth groove is matched with the first groove, the end socket 12 is fixed on the end socket connecting part 8 through welding, in order to enhance the strength of the end socket 12 and the end socket connecting part 8, the welding part of the end socket 12 and the end socket connecting part 8 is provided with a circle of first reinforcing ring 18 through welding, the other end of the end socket 12 is provided with an arc-shaped surface 13, and the arc-shaped surface is set to be an arc-shaped surface, so that the stress area is increased, the pressure is properly reduced, and the service life of the pipeline is prolonged.

For the convenience of processing, the high-speed section pipeline is a seamless pipeline, and the low-speed section pipeline 1 is a seam pipeline.

In order to ensure the strength of the low-speed pipeline 1, a plurality of second reinforcing rings 3 are arranged on the outer wall of the low-speed pipeline at equal intervals.

In order to place the low-speed section pipeline 1 conveniently, two placing frames 4 are arranged on the low-speed end pipeline 1 through welding, and the placing frames 4 are fixed on the ground through bolts.

The inventor provides a specific pressure-reducing oil-transfer line low-speed section pipeline, the number of the high-speed section pipeline is 4, the number of the special-shaped flanging parts is 4, two special-shaped flanging parts close to a connecting end for connecting an external pipeline are defined as a first special-shaped flanging part 6, the other two special-shaped flanging parts are defined as a second special-shaped flanging part 7, the high-speed section pipeline on the first special-shaped flanging part 6 is a first high-speed section pipeline 16, the high-speed section pipeline on the second special-shaped flanging part 7 is a second high-speed section pipeline 17, the included angle between the first high-speed section pipeline and the low-speed section pipeline is α, the included angle between the second high-speed section pipeline and the low-speed end pipeline is β, and the degree of α is 4% less than that of β.

The principle is explained as follows: the utility model discloses a general decompression of flue gas stream changes oil line low-speed section pipeline because high-speed section pipeline reduces with 4 thousandth slope gradually along the horizontal direction to the link of connecting outside pipeline, has reduced the impact of medium to low-speed section pipeline, and 4 thousandth is the best data that are obtained through long-time experiment, has both guaranteed certain velocity of flow, and is less relatively to the impact of low-speed section pipeline simultaneously, and the comprehensive consideration is best.

In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of describing the technical solutions of the present patent and for simplification of the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present patent application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (7)

1. A low-speed section pipeline of a pressure reduction oil transfer line is characterized by comprising a low-speed section pipeline, a plurality of high-speed section pipelines and end sockets, wherein the number of the high-speed section pipelines is an even number;

one end of the low-speed section pipeline is provided with a connecting end for connecting an external pipeline, the other end of the low-speed section pipeline is provided with an end socket connecting part for welding an end socket, and the end socket connecting part is provided with a first groove; a plurality of special-shaped flanging parts are symmetrically arranged on the low-speed section pipeline along the horizontal direction, and the special-shaped flanging parts gradually decrease with a gradient of 4 per mill towards the direction of a connecting end connected with an external pipeline; the upper end surfaces of the special-shaped flanging parts are consistent with the cross section shape of the high-speed section pipeline to be connected, and second grooves are formed in the upper end surfaces of the special-shaped flanging parts;

the bottoms of the high-speed section pipelines are provided with third grooves matched with the second grooves on the corresponding special-shaped flanging parts, the second grooves and the third grooves form welding grooves, and the high-speed section pipelines are fixed on the special-shaped flanging parts through welding;

one end of the seal head is provided with a welding part, a fourth groove is arranged on the welding part and is matched with the first groove, the seal head is fixed on the seal head connecting part through welding, and the other end of the seal head is provided with an arc-shaped surface.

2. The low-speed section pipeline of the pressure reduction oil transfer line according to claim 1, wherein a manhole flanging part is arranged on the low-speed section pipeline, a flange seat is arranged on the manhole flanging part through welding, a manhole cover is fixed on the flange seat through bolts, and a sealing ring is arranged at the joint of the flange seat and the manhole cover.

3. The low-speed pipeline of the pressure-reducing oil transfer line as claimed in claim 1 or 2, wherein a first reinforcing ring is fixedly arranged at the welding position of the connecting part of the end socket and the end socket by welding.

4. The reduced-pressure oil transfer line low-speed section pipeline according to claim 1 or 2, wherein the high-speed section pipeline is a seamless pipeline, and the low-speed section pipeline is a slotted pipeline.

5. The pressure-reducing oil transfer line low-speed section pipeline as claimed in claim 4, wherein a plurality of second reinforcing rings are arranged on the outer wall of the low-speed section pipeline at equal intervals.

6. The low-speed pipeline of the pressure-reducing oil transfer line according to claim 1 or 2, wherein two placing frames are welded on the low-speed pipeline, and the placing frames are fixed on the ground through bolts.

7. The pressure-reducing oil-transfer line low-speed section pipe according to claim 1 or 2, wherein the number of the high-speed section pipes is 4, and the number of the irregularly-shaped turnup portions is 4.

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