CN218178623U

CN218178623U - Injection facility for 90-degree turning pipeline

Info

Publication number: CN218178623U
Application number: CN202222055986.5U
Authority: CN
Inventors: 李永进; 朱玥; 钱文英; 张澄清; 王京红; 杨冬伟
Original assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-12-30
Anticipated expiration: 2032-08-05

Abstract

The utility model discloses an injection facility for 90 pipelines that turn, this injection facility adopt to be responsible for the tee bend and realize 90 functions of turning of pipeline, through set up the flange on the tee bend, match with the reducing double flange on the insert tube subassembly, avoid using 90 elbows, avoid trompil reinforcement on the elbow simultaneously, can guarantee the overall structure intensity and the security of injection facility. The assembly of the insert pipe can be completed in a prefabrication plant, the field welding work amount is small, the construction cost is saved, and the investment is reduced.

Description

Injection facility for 90-degree turning pipeline

Technical Field

The utility model belongs to the technical field of petrochemical device pipe connection, concretely relates to injection facility for 90 turn pipelines.

Background

In petrochemical plants, there are many sets of pipeline injection facilities such as dosing facilities, water injection facilities, etc. on process pipelines. These injection facilities generally consist of a main process media pipe and an injection media insert pipe, and to facilitate disassembly and maintenance, a removable assembly is often provided between the main pipe and the insert pipe.

At present, the injection mode of the injection facility is generally straight pipe injection, namely, the process main pipe is a section of horizontal straight pipe section, and the injection pipe is injected in a way of being vertical to the process main pipe. In addition, pipeline injection facilities often require long straight pipe sections before and after the injection point. However, due to practical space and position limitations, the pipeline layout may be unsuitable for setting straight pipe injection, for example, the length of a horizontal straight pipe section of the pipeline is short, and a long straight pipe section required before and after an injection point needs to be divided into a front part and a rear part at a pipeline turning part, in which case, the pipeline injection setting must be set at a position where a pipeline element is an elbow or a tee.

Patent CN110559953A discloses a liquid injection device, which is implemented by opening a hole on a 90-degree elbow of a pipeline for reinforcement, wherein an injection medium insertion pipe is welded at the opening of the elbow, and two pairs of disassembly flanges have to be arranged on a process main pipe for overhauling and disassembling the insertion pipe and a spray head thereof. The disadvantages are that: firstly, two pairs of large-caliber detachable flanges are arranged on the process main pipe, which directly increases the pipeline investment; secondly, when the injection pipe and the spray head thereof are overhauled and disassembled, the detachable section arranged on the main pipe must be disassembled and assembled, the caliber of the process main pipe is larger, the weight of the detachable section is larger, the overhaul is very inconvenient, even the measures such as a hanging beam and the like can be needed, and the overhaul and maintenance cost is increased. Therefore, it is urgently needed to design an injection facility which has low pipeline investment, convenient inspection and maintenance and easy operation and can be used for pipelines with 90 degrees of turning.

SUMMERY OF THE UTILITY MODEL

In order to solve the pipeline investment that exists among the above-mentioned prior art high, examine the maintenance inconvenient, to 90 not strong scheduling problem of turn pipeline suitability, the utility model provides an injection facility for 90 turn pipelines.

The utility model provides an injection facility for a 90-degree turning pipeline, which comprises a turning assembly of a process main pipe and an insertion pipe assembly; the process main pipe turning assembly comprises a main pipe tee joint and a main pipe flange; the insert pipe assembly comprises a reducing double-sided flange, an insert pipe straight pipe, an injection straight pipe, an insert pipe elbow, an insert pipe dismounting flange and an insert pipe spray head; the insert pipe disassembly flange, the insert pipe elbow, the insert pipe straight pipe, the reducing double-sided flange, the injection straight pipe and the insert pipe spray head are sequentially connected; the reducing double-sided flange is connected with the main pipe flange, the main pipe flange is connected with the main pipe tee joint, and the inserting pipe nozzle extends into the center of the main pipe tee joint.

Preferably, the main pipe tee is an equal-diameter tee with the same nominal diameter as the process main pipe so as to realize 90-degree turning of the main process medium.

Preferably, the main pipe flange is a standard flange with the same nominal diameter as the main pipe tee joint.

Preferably, the sealing surface of the reducing double-sided flange is matched with the main pipe flange, and the reducing double-sided flange and the main pipe flange are fastened and sealed through a gasket, a bolt and a nut.

Preferably, the reducing double-sided flange is connected with the inserting pipe straight pipe and the spraying straight pipe in a welding mode, and the nominal diameter and the wall thickness of the welding end of the reducing double-sided flange are the same as those of the inserting pipe straight pipe and the spraying straight pipe.

Preferably, a baffle is welded on the outer wall of the jet straight pipe to prevent the insert pipe from vibrating when the medium is injected at a high speed.

Preferably, a gap of 2-4mm is reserved between the baffle and the inner wall of the main pipe tee joint.

The utility model discloses following beneficial effect has:

1) This injection facility adopts and is responsible for the tee bend and realize the function that the pipeline turned 90, through set up the flange on the tee bend, matches with the reducing double-sided flange on the insert tube subassembly, avoids using 90 degrees elbows, avoids trompil reinforcement on the elbow simultaneously, can guarantee the overall structure intensity and the security of injection facility.

2) The reducing double-sided flange adopted by the injection facility can be directly welded with the two sections of insert pipes, the flange sealing surface of the flange is connected with a standard flange welded on the main pipe tee, the insert pipe assembly can be completed in a prefabrication plant, the field welding work amount is less, the construction cost is saved, and the investment is reduced.

3) The injection facility only needs to arrange a pair of flanges on the main pipe, and the insert pipe and the spray head thereof can be completely taken out only by disassembling a piece of reducing double-sided flange, so that the operation is simple and convenient, the operation is easy, and the pipeline investment and the maintenance cost are greatly reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1. the inserting pipe is detached from the flange; 2. inserting a pipe elbow; 3. inserting a tube straight tube; 4. a reducing double-sided flange; 5. a baffle plate; 6. an insert tube spray head; 7. a gasket; 8. a bolt and a nut; 9. a main pipe flange; 10. a main pipe tee joint; 11. and (4) spraying a straight pipe.

Detailed Description

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

As shown in fig. 1, the utility model discloses an injection facility for 90 ° turn pipeline, which comprises a process main pipe turn assembly and an insert pipe assembly; the process main pipe turning assembly comprises a main pipe tee joint 10 and a main pipe flange 9; the insert pipe assembly comprises a reducing double-sided flange 4, an insert pipe straight pipe 3, an injection straight pipe 11, an insert pipe elbow 2, an insert pipe dismounting flange 1 and an insert pipe spray head 6; the insert pipe disassembly flange 1, the insert pipe elbow 2, the insert pipe straight pipe 3, the reducing double-sided flange 4, the injection straight pipe 11 and the insert pipe nozzle 6 are connected in sequence; the reducing double-sided flange 4 is connected with a main pipe flange 9, the main pipe flange 9 is connected with a main pipe tee 10, the inserting pipe nozzle 6 extends into the center of the main pipe tee 10, and the medium flow direction in the inserting pipe assembly is consistent with the medium flow direction after the process main pipe turns. Three baffles 5 are welded on the outer wall of the jet straight pipe 11, the three baffles 5 are uniformly distributed at intervals of 120 degrees in the radial direction of the jet branch pipe, and a 3mm gap is reserved between each baffle 5 and the inner wall of the main pipe tee 10.

The process main pipe turning assembly is characterized in that a main pipe flange 9 and a main pipe tee 10 are directly welded and connected to reduce dead zones, the nominal diameters of the main pipe flange 9 and the main pipe tee 10 are the same as the nominal diameter of a process main pipe, and the nominal diameters and the wall thicknesses of the welding end of the reducing double-faced flange 4, the inserting pipe straight pipe 3 and the spraying straight pipe 11 are the same.

The connection of the inserting pipe assembly and the process main pipe turning assembly is realized through the matching between the reducing double-faced flange 4 and the main pipe flange 9, and the two parts are fastened through a gasket 7, a bolt and a nut 8 which are used as fasteners, so that the detachability and the maintainability of the two parts are realized.

The foregoing is only an exemplary embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications or replacements can be made without departing from the principle of the present invention, and these modifications or replacements should also be considered as the protection scope of the present invention.

Claims

1. An injection installation for a 90 ° turn pipeline, characterized in that: comprises a process main pipe turning assembly and an inserting pipe assembly; the process main pipe turning assembly comprises a main pipe tee joint and a main pipe flange; the insert pipe assembly comprises a reducing double-sided flange, an insert pipe straight pipe, an injection straight pipe, an insert pipe elbow, an insert pipe dismounting flange and an insert pipe nozzle; the insert pipe disassembly flange, the insert pipe elbow, the insert pipe straight pipe, the reducing double-sided flange, the injection straight pipe and the insert pipe spray head are sequentially connected; the reducing double-sided flange is connected with the main pipe flange, the main pipe flange is connected with the main pipe tee joint, and the inserting pipe nozzle extends into the center of the main pipe tee joint.

2. An injection installation for a 90 ° turn pipeline according to claim 1, characterized in that: the main pipe tee joint is an equal-diameter tee joint with the same nominal diameter as the process main pipe.

3. An injection installation for a 90 ° turn pipeline according to claim 1, characterized in that: the main pipe flange is a standard flange with the same nominal diameter as the main pipe tee joint.

4. An injection installation for a 90 ° turn pipeline according to claim 1, characterized in that: the sealing surface of the reducing double-sided flange is matched with the main pipe flange, and the reducing double-sided flange and the main pipe flange are fastened and sealed through a gasket, a bolt and a nut.

5. An injection installation for a 90 ° turn pipeline according to claim 1, characterized in that: the reducing double-sided flange is in welded connection with the inserting pipe straight pipe and the spraying straight pipe, and the nominal diameter and the wall thickness of the welding end of the reducing double-sided flange are the same as those of the inserting pipe straight pipe and the spraying straight pipe.

6. An injection installation for a 90 ° turn pipeline according to claim 1, characterized in that: and a baffle is welded on the outer wall of the jet straight pipe.

7. Injection installation for a 90 ° turn pipe according to claim 6, characterized in that: and a 2-4mm gap is reserved between the baffle and the inner wall of the main pipe tee joint.