CN219348584U

CN219348584U - Detachable elbow device for corrosion test

Info

Publication number: CN219348584U
Application number: CN202223363859.8U
Authority: CN
Inventors: 高路杨; 桂林; 吕刘帅; 胡苧尹; 韩建; 肖调兵; 陈银强
Original assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Current assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-07-14
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to the technical field of fluid corrosion tests, and particularly discloses a detachable pipe bending device for a corrosion test. The device comprises a detachable bent pipe section and a clamping device, wherein the detachable bent pipe section comprises a detachable bent pipe and hanging lugs arranged on two end faces of the detachable bent pipe; the clamping device comprises an upper clamping disc and a lower clamping disc, wherein a pipe bending groove and a hanging lug groove are formed in the upper clamping disc and the lower clamping disc, two ends of the detachable pipe bending and the hanging lugs can be arranged in the pipe bending groove and the hanging lug groove in a matched mode, and the upper clamping disc and the lower clamping disc can be buckled in a matched mode, and the detachable pipe bending section is fixed in the clamping device. The device can simulate the corrosion behavior of the real bent pipe in the fluid corrosion environment, visually represent the actual corrosion state of the inner wall of the bent pipe, and acquire effective corrosion evaluation data; meanwhile, the bend section is designed in a detachable mode, so that the sample can be conveniently detached at any time, abrasion is not easy to occur in the detaching process, and the stability of evaluation data is guaranteed.

Description

Detachable elbow device for corrosion test

Technical Field

The utility model belongs to the technical field of fluid corrosion tests, and particularly relates to a detachable pipe bending device for a corrosion test.

Background

The main function of the steam water supply system of the power plant is to convey the steam generated by the steam generator to the steam turbine generator to do work, and the steam after doing work is conveyed to the condenser through a pipeline to be condensed into water and then conveyed to the steam generator through the water supply pump. The steam water supply system plays an important role in the process of realizing steam/water fluid delivery, and once corrosion leakage occurs in a pipeline system, the normal operation of pipelines and series equipment is seriously affected, and even the operation safety of a power plant is threatened. The high temperature and high pressure steam/water fluid in the steam water supply pipeline system is easy to cause flow acceleration corrosion, cavitation, scouring and other corrosion problems, and the fluid at the bent part is easy to generate turbulence due to the special structure of the bent part, and the corrosion is easy to occur at the bent part due to the action of mechanical force. Many students adopt a tube flow type corrosion test device in a laboratory to study the corrosion characteristics of the bent tube part, and most of the methods are nondestructive inspection or a method for suspending a sheet-shaped sample in the bent tube, but the methods cannot completely and truly reflect the corrosion condition of the bent tube part, and influence the effectiveness of an evaluation result.

Disclosure of Invention

The utility model aims to provide a detachable pipe bending device for corrosion test, which solves the problem of evaluating the effectiveness of corrosion behavior of a pipe bending.

The technical scheme of the utility model is as follows: the detachable pipe bending device for the corrosion test comprises a detachable pipe bending section and a clamping device, wherein the detachable pipe bending section comprises a detachable pipe bending and hanging lugs arranged on two end faces of the detachable pipe bending; the clamping device comprises an upper clamping disc and a lower clamping disc, wherein a pipe bending groove and a hanging lug groove are formed in the upper clamping disc and the lower clamping disc, two ends of the detachable pipe bending and the hanging lugs can be arranged in the pipe bending groove and the hanging lug groove in a matched mode, and the upper clamping disc and the lower clamping disc can be buckled in a matched mode, and the detachable pipe bending section is fixed in the clamping device.

The detachable bent pipe is formed by bending a straight pipe section in an equal proportion according to the curvature radius and the diameter size of an actual bent pipe and according to the curvature radius of the actual bent pipe in a direction of 0-90 degrees.

The curvature radius of the bent pipe groove is the same as that of the two end parts of the detachable bent pipe.

The end part of the bent pipe groove is provided with a hanging lug groove, and the outer side surfaces of hanging lugs on the two end surfaces of the detachable bent pipe are provided with gaskets to seal the detachable bent pipe.

The upper clamping disc is provided with 3 flat holes which are respectively distributed at three top ends of the upper clamping disc; the lower clamping disc is provided with 3 threaded holes which are respectively distributed at three top ends of the lower clamping disc and correspond to three flat holes on the upper clamping disc.

The thickness of the hanging lugs is 2-4 mm.

The utility model has the remarkable effects that: the detachable pipe bending device for the corrosion test can simulate the corrosion behavior of a real pipe bending in a fluid corrosion environment, visually represent the actual corrosion state of the inner wall of the pipe bending, and acquire effective corrosion evaluation data; meanwhile, the bend section is designed in a detachable mode, so that the sample can be conveniently detached at any time, abrasion is not easy to occur in the detaching process, and the stability of evaluation data is guaranteed.

Drawings

FIG. 1 is a schematic view of a detachable pipe bending device for corrosion test according to the present utility model;

FIG. 2 is a schematic view of the upper clamping plate in FIG. 1;

FIG. 3 is a schematic view of the lower clamping plate of FIG. 1;

FIG. 4 is a schematic view of the bend pipe section of FIG. 1;

in the figure: 1. an upper clamping plate; 2. a lower clamping plate; 3. a flat hole; 4. a threaded hole; 5. a curved pipe groove; 6. a gasket; 7. a hanging lug groove; 8. a detachable elbow; 9. hanging lugs; 10. and (5) a bolt.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings and specific examples.

As shown in fig. 1 to 4, the detachable pipe bending device for corrosion test comprises a detachable pipe bending section and a clamping device, wherein the detachable pipe bending section comprises a pipe bending 8 and a hanging lug 9, the clamping device comprises an upper clamping disc 1, a lower clamping disc 2 and a gasket 6, the detachable pipe bending 8 is an actual pipe bending which is bent by the straight pipe section in equal proportion according to a certain curvature radius and is in a 0-90 DEG direction, two end surfaces of the detachable pipe bending 8 are welded with the hanging lug 9, the thickness of the hanging lug 9 is 2-4 mm, and the outer end surface of the hanging lug 9 is polished smoothly and is clung to the gasket 6; a pipe bending groove 5 and a hanging lug groove 7 are arranged in an upper clamping disc 1 and a lower clamping disc 2 in the clamping device, wherein the curvature radius of the pipe bending groove 5 is the same as that of the detachable pipe bending 8; the two ends of the bent pipe groove 5 are provided with hanging lug grooves 7 which play a limiting role on hanging lugs 9; the upper clamping disc 1 is provided with 3 flat holes 3 which are respectively distributed at three top ends of the upper clamping disc 1; the lower clamping disc 2 is provided with 3 threaded holes 4 which are respectively distributed at three top ends of the lower clamping disc 2 and correspond to the three flat holes 3 on the upper clamping disc 1;

the detachable bent pipe section is flatly placed at the positions of the bent pipe groove 5 and the hanging lug groove 7 in the lower clamping disc 2, wherein the bent pipe section is attached to the bent pipe groove 5, hanging lugs 9 at two ends of the bent pipe section are positioned in the hanging lug groove 7, and the gasket 6 is utilized to protect and seal the detachable bent pipe 8 so as to prevent fluid in the bent pipe 8 from flowing out; the upper clamping disc 1 is buckled on the lower clamping disc 2, the bent pipe section is attached to a bent pipe groove 5 in the upper clamping disc 1, and hanging lugs at two ends of the bent pipe section are positioned in hanging lug grooves 7 in the upper clamping disc 1; after the buckling gaps of the upper clamping disc 1 and the lower clamping disc 2 are attached, a bolt 10 penetrates into the threaded hole 4 in the lower clamping disc 2 from the flat hole 3 in the upper clamping disc 1 and is screwed; and placing the assembled pipe bending device into a pipe flow type corrosion test stand to perform a pipe bending corrosion test.

Claims

1. The detachable pipe bending device for the corrosion test is characterized by comprising a detachable pipe bending section and a clamping device, wherein the detachable pipe bending section comprises a detachable pipe bending (8) and hanging lugs (9) arranged on two end faces of the detachable pipe bending; clamping device includes clamping disk (1) and lower clamping disk (2), wherein, is equipped with curved pipe groove (5) and hangers groove (7) in last clamping disk (1) and lower clamping disk (2), can dismantle return bend (8) both ends and hangers (9) can match and set up in curved pipe groove (5) and hangers groove (7), go up clamping disk (1) and lower clamping disk (2) can match the lock, and will can dismantle the curved pipe section is fixed in the clamping device.

2. The detachable pipe bending device for corrosion test according to claim 1, wherein the detachable pipe bending device (8) is a pipe bending device which is formed by performing equal proportion shrinkage by using a straight pipe section according to the curvature radius and the diameter size of an actual pipe bending and bending the straight pipe section according to the curvature radius of the actual pipe bending in the direction of 0-90 degrees.

3. The detachable elbow device for corrosion test according to claim 1, wherein the radius of curvature of the elbow groove (5) is the same as the radius of curvature of both ends of the detachable elbow (8).

4. The detachable pipe bending device for corrosion test according to claim 1, wherein the end part of the pipe bending groove (5) is provided with a hanging lug groove (7), and the outer side surfaces of hanging lugs (9) on the two end surfaces of the detachable pipe bending (8) are provided with gaskets (6) for sealing the detachable pipe bending (8).

5. The detachable pipe bending device for corrosion test according to claim 1, wherein the upper clamping disk (1) is provided with 3 flat holes (3) which are respectively distributed at three top ends of the upper clamping disk (1); the lower clamping disc (2) is provided with 3 threaded holes (4) which are respectively distributed at three top ends of the lower clamping disc (2) and correspond to three flat holes (3) on the upper clamping disc (1).

6. The detachable pipe bending device for corrosion test according to claim 1, wherein the thickness of the hanging lugs (9) is 2-4 mm.