CN213064179U

CN213064179U - Negative plate fixing device for radiographic inspection of small-diameter pipe welding seam

Info

Publication number: CN213064179U
Application number: CN202022055068.3U
Authority: CN
Inventors: 侯哲; 刘建; 胡旭春
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-04-27
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses a film fixing device to path pipe welding seam ray detection belongs to welding seam check out test set field, including fixed plate, screw, rubber band, the screw sets up the both ends of fixed plate, the rubber band install in on the screw. The utility model discloses can fix the negative on the path pipe, install and dismantle convenient and fast to promote detection efficiency.

Description

Negative plate fixing device for radiographic inspection of small-diameter pipe welding seam

Technical Field

The utility model belongs to welding seam check out test set field, concretely relates to film fixing device to small diameter tube welding seam ray detection.

Background

In the field of nondestructive testing, ray detection is one of the essential technical means for evaluating the installation quality and safe use of equipment, has the characteristics of accuracy, reliability, intuition, easy check and the like, and is widely applied to industries such as metallurgy, chemical industry, electric power, food, petroleum and natural gas and the like. When a negative film (film) is arranged on a small-diameter pipe (D is less than 100 mm), elliptical imaging is carried out according to standard requirements, the negative film needs to be flatly arranged close to the outer wall of a pipeline (a circular weld joint is projected onto a plane), the negative film cannot be wrapped and arranged close to the outer wall of the pipeline like a large-diameter pipeline (the circular weld joint is projected onto a circular arc-shaped curved surface), and otherwise, the weld joint forms a D-shaped line on the negative film for imaging. The arrangement of the bottom plate in a flat manner is more difficult than the arrangement of the bottom plate in a wrapping manner, and when the number of the detected welding seams is large, the workload of arranging the bottom plate is not negligible. The common fixing methods include magnet fixing and adhesive tape fixing, but both methods have certain limitations.

The magnet fixing method is usually used for small-diameter pipes made of ferromagnetic materials, such as carbon steel, and is to attract a dark bag provided with a negative film to two sides of a weld joint to be detected by using magnets. However, some non-ferromagnetic materials, such as austenitic stainless steel, cannot be fixed using magnets because they cannot be magnetized and the magnets have no attraction to them.

The tape fixing method is usually used for non-ferromagnetic materials, i.e. the hidden bag with the negative film is stuck on the pipe wall by using a tape, and because the hidden bag is heavy, the hidden bag needs to be stuck for many times during one-time fixing, and the method has low efficiency. In addition, for some special working conditions, for example, a low-temperature pipeline is coated with an insulating layer, the insulating layer needs to be removed during detection, and the temperature difference between the two sides of the pipeline wall is large, so that the surface of the pipeline is frosted frequently, the adhesive tape is poor in viscosity and not firm in fixation, and great difficulty is brought to detection work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the above problems and provide a film fixing device for radiographic inspection of small-diameter tube weld joints.

The utility model discloses a following technical scheme realizes above-mentioned purpose.

The utility model provides a film fixing device to small diameter tube welding seam ray detection, includes fixed plate, screw, rubber band, the screw sets up the both ends of fixed plate, the rubber band install in on the screw.

In the structure, the bottom sheet is firstly flatly placed on the fixing plate, then the fixing plate is pasted on the pipeline to be detected, the bottom sheet is positioned between the fixing plate and the pipeline to be detected, and then the rubber band is utilized to fix the fixing plate on the pipeline to be detected, so that nondestructive detection can be directly carried out, the method is simple and convenient, and the detection efficiency is greatly improved.

In order to further improve the utility model discloses a performance, the fixed plate is the plank, and length is 170mm, and the width is 100 mm.

In order to further improve the utility model discloses a performance, the rubber band is hollow rubber band, and length is 450mm, and the diameter is 8 mm.

In order to further improve the utility model discloses a performance, the fixed plate with screw fixed connection.

In order to further improve the utility model discloses a performance, the method that the rubber band was installed on the screw is: one end of the rubber band which is folded in half is tied to the screw and is fixedly connected with the screw; the other end of the rubber band bypasses the pipeline to be tested and is sleeved on the other screw to be connected by a loop.

By adopting the structure, the utility model discloses following beneficial effect has: the X-ray negative can be stably fixed on the pipeline to be detected without being limited by the material and the operation condition of the detected pipeline, and the installation and the disassembly are convenient and quick, so that the detection speed and the detection efficiency are improved.

Drawings

Fig. 1 is a perspective view of a film fixing device for radiographic inspection of small-diameter tube welds according to the present invention.

Fig. 2 is a schematic working diagram of the film fixing device for the radiographic inspection of the small-diameter tube weld joint.

Fig. 3 and 4 are schematic diagrams of a small-diameter pipe in an inclined transillumination mode towards a welded joint.

In the figure, 1 is a fixing plate, 2 is a screw, 3 is a rubber band, 4 is a bottom plate, and 5 is a pipeline to be tested.

D is the size of the ray source, b is the distance from the upper surface of the workpiece to the negative, f is the distance from the ray source to the upper surface of the workpiece, T is the wall thickness of the pipeline, and D is the diameter of the pipeline.

Detailed Description

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

As shown in fig. 1 and 2, the film fixing device for radiographic inspection of the small-diameter tube weld joint comprises a fixing plate 1, screws 2 and rubber bands 3, wherein the screws 2 are arranged at two ends of the fixing plate 1, and the rubber bands 3 are arranged on the screws 1.

In the structure, the bottom plate 4 is flatly placed on the fixing plate 1, the fixing plate 1 is attached to the pipeline 5 to be detected, the bottom plate 4 is located between the fixing plate 1 and the pipeline 5 to be detected, and the fixing plate 1 is fixed on the pipeline 5 to be detected by the aid of the rubber band 3, so that nondestructive testing can be directly conducted.

In order to further improve the utility model discloses a performance, fixed plate 1 adopts the plank, length is 170mm, the width is 100mm, the specification than the camera bag is slightly bigger, rubber band 3 is hollow rubber band, length is 450mm, the diameter is 8mm, can guarantee like this that 3 fifty percent discount poststretchings of rubber band bind more firmly, 2 self-tapping screws in the both ends of fixed plate 1 of screw, 3 fifty percent discount backs of rubber band, open-ended one end is in screw 2, for fixed connection, the other end is walked around the pipeline 5 sets of awaiting measuring on another screw, for the loop connection, the back is accomplished in the exposure, the rubber band 3 of taking off loop end can lift the device off.

Claims

1. The utility model provides a film fixing device to small diameter tube welding seam radiographic testing which characterized in that: the fixing plate comprises a fixing plate, screws and rubber bands, wherein the screws are arranged at two ends of the fixing plate, and the rubber bands are arranged on the screws.

2. The negative fixing device for the radiographic inspection of the small-diameter pipe welding seam according to claim 1, wherein: the fixed plate is a wood plate, the length of the fixed plate is 170mm, and the width of the fixed plate is 100 mm.

3. The negative fixing device for the radiographic inspection of the small-diameter pipe welding seam according to claim 1, wherein: the rubber band is a hollow rubber band, the length of the rubber band is 450mm, and the diameter of the rubber band is 8 mm.

4. The negative fixing device for the radiographic inspection of the small-diameter pipe welding seam according to claim 1, wherein: the fixing plate is fixedly connected with the screw.

5. The negative fixing device for the radiographic inspection of the small-diameter pipe welding seam according to claim 1, wherein: the method for installing the rubber band on the screw comprises the following steps: one end of the rubber band which is folded in half is tied to the screw and is fixedly connected with the screw; the other end of the rubber band bypasses the tested pipeline and is sleeved on the other screw to be connected by a loop.