Se75 radiographic device for detecting fillet weld of tube and tube plate of heat exchanger

Abstract

The utility model discloses a Se75 radiographic device for heat exchanger tube and tube plate fillet weld detection, which comprises an exposure conduit and a tube, the outer side of the exposure conduit is symmetrically connected with positioning washers in a sliding manner, one end of the exposure conduit is provided with an adapter, one end of the exposure conduit far away from the adapter is provided with an exposure point adjusting bolt, and the exposure point adjusting bolt is connected with the tube. An exposure point is arranged on the outer side of the exposure guide pipe, and a film is arranged on the outer side of the exposure guide pipe and located on one side of the positioning gasket in a sleeving manner; the device has the beneficial effects that the function of quickly detecting the fillet weld of the pipe and the pipe plate is realized by arranging the exposure guide pipe, the positioning gasket, the adapter, the film, the exposure point and the exposure point adjusting bolt, so that the detection efficiency of the fillet weld of the pipe and the pipe plate is greatly improved, the equipment failure rate is extremely low, and the production cost is reduced. And the equipment maintenance cost and the equipment price are low, technical popularization is easy, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of weld detection, in particular to a Se75 radiographic device used for detecting fillet welds of tubes and tube sheets of heat exchangers. Background Art

[0002] Heat exchangers are important equipment in petrochemical plants, mainly composed of shells, heat transfer tube bundles, tube sheets, baffles and tube boxes. The heat exchange efficiency of heat exchangers will directly affect the process stability and production capacity of chemical plants. Therefore, the welding quality of the tube-tube sheet fillet weld is crucial in the manufacturing process of heat exchangers. The leakage of the tube-tube sheet fillet weld will significantly reduce the heat exchange efficiency of the heat exchanger, resulting in it not meeting the process requirements. In the prior art, the radiographic inspection of the tube-tube sheet fillet weld is mainly carried out by a rod anode X-ray machine. However, before each operation, the rod anode X-ray machine needs to be trained, which wastes time. In addition, the equipment is complex, the failure rate is high during operation, which is not conducive to the continuous detection work. After a failure occurs, the maintenance cost is high, which is not conducive to the large-scale promotion of the technology and is inconvenient to use. Therefore, we propose a Se75 radiographic device for detecting the fillet welds of heat exchanger tubes and tube sheets. Utility Model Content

[0003] The purpose of the utility model is to provide a Se75 radiographic device for detecting fillet welds of tubes and tube sheets of heat exchangers, so as to solve the problem that the radiographic transillumination of fillet welds of tubes and tube sheets proposed in the above-mentioned background technology is mainly implemented by a rod anode X-ray machine, but before each work, the rod anode X-ray machine needs to be trained, which wastes time, and the equipment is complex, the failure rate is high during work, which is not conducive to the continuous progress of the detection work, and the maintenance cost is high after a failure occurs, which is not conducive to the large-scale promotion of the technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A Se radiographic device for detecting fillet welds of tubes and tube sheets of heat exchangers comprises an exposure tube and a tube, wherein a positioning washer is symmetrically and slidably connected to the outer side of the exposure tube, an adapter is provided at one end of the exposure tube, an exposure point adjustment bolt is provided at the end of the exposure tube away from the adapter, an exposure point is provided on the outer side of the exposure tube, and a film is sleeved on the outer side of the exposure tube and on one side of the positioning washer.

[0006] It can be understood that the utility model sets the positioning gasket so that the exposure point is located at the center of the tube during operation, thereby ensuring the uniformity of the film blackness and the transillumination effect. The setting of the adapter facilitates the connection of the Se radiation source guide tube, thereby smoothly introducing the radiation source into the exposure guide tube. The position of the radiation source can be adjusted by setting the exposure point adjustment bolt to ensure that the radiation source is always located at the exposure point.

[0007] Preferably, a central hole for use with an exposure guide tube is provided on the outer side of the film.

[0008] It can be understood that the utility model facilitates the movement of the position of the film through the provision of the central hole.

[0009] Preferably, one end of the adapter is provided with an external thread.

[0010] It can be understood that the utility model facilitates the connection with the Se radiation source guide tube through the provision of external threads.

[0011] Preferably, a tube sheet is fixedly connected to the outer side of the tube.

[0012] It can be understood that the utility model facilitates the detection of the weld between the tube sheet and the tube through the arrangement of the tube sheet.

[0013] Preferably, one end of the exposure point adjustment bolt is fixedly connected to a fixing knob, and the outer side of the fixing knob is fixedly connected to an anti-slip sleeve.

[0014] It can be understood that the setting of the fixed knob of the utility model facilitates the rotation of the exposure point adjustment bolt.

[0015] The beneficial effects achieved by the utility model are as follows: by arranging the exposure guide tube, the positioning gasket, the adapter, the film, the exposure point and the exposure point adjustment bolt, the function of quickly detecting the fillet welds of the tube and tube sheet is realized, so that the detection efficiency of the fillet welds of the tube and tube sheet is greatly improved, and the equipment failure rate is extremely low, the equipment maintenance cost and the equipment price are low, and the technology is easy to promote and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model when it is used;

[0018] Figure 2 It is a structural schematic diagram of the positioning washer of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the adapter of the utility model.

[0020] In the figure: 1. Exposure guide tube; 2. Positioning gasket; 3. Tube plate; 4. Adapter; 5. External thread; 6. Film; 7. Exposure point; 8. Tube; 9. Exposure point adjustment bolt; 10. Fixing knob. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 3 , the utility model provides a technical solution:

[0023] A Se75 radiographic device for detecting fillet welds of tubes and tube sheets of heat exchangers comprises an exposure tube 1 and a tube 8, a positioning washer 2 is symmetrically and slidingly connected to the outer side of the exposure tube 1, an adapter 4 is provided at one end of the exposure tube 1, an exposure point adjustment bolt 9 is provided at the end of the exposure tube 1 away from the adapter 4, an exposure point 7 is provided on the outer side of the exposure tube 1, and a film 6 is sleeved on the outer side of the exposure tube 1 and on one side of the positioning washer 2.

[0024] It can be understood that the utility model sets the positioning gasket 2 so that the exposure point 7 is located at the center of the tube 8 during operation, thereby ensuring the uniformity of the film blackness and the transillumination effect. The setting of the adapter 4 facilitates the connection of the Se75 radiation source guide tube, thereby smoothly introducing the radiation source into the exposure guide tube 1. The position of the radiation source can be adjusted by setting the exposure point adjustment bolt 9 to ensure that the radiation source is always located at the exposure point 7.

[0025] Furthermore, a through hole for use with the exposure guide tube 1 is provided on the outer side of the film 6 .

[0026] It can be understood that the utility model facilitates the movement of the position of the film 6 by setting the central hole.

[0027] Furthermore, one end of the adapter 4 is provided with an external thread 5 .

[0028] It can be understood that the utility model facilitates connection with the Se75 radiation source guide tube through the provision of the external thread 5.

[0029] Furthermore, the outer side of the tube 8 is fixedly connected with the tube sheet 3 .

[0030] It can be understood that the utility model facilitates the detection of the weld between the tube sheet 3 and the tube 8 through the arrangement of the tube sheet 3 .

[0031] Furthermore, one end of the exposure point adjustment bolt 9 is fixedly connected to a fixed knob 10 , and the outer side of the fixed knob 10 is fixedly connected to an anti-slip sleeve.

[0032] It can be understood that the setting of the fixed knob 10 of the utility model is convenient for driving the exposure point adjustment bolt 9 to rotate.

[0033] Specifically, when in use, the device is used in conjunction with a Se75 radiation source. First, the Se75 source guide tube is connected to the adapter 4 of the device, and then the punched and sealed film 6 is threaded through the center hole to the left side of the adapter 4, and then the matching positioning gasket 2 is passed through the left side of the film 6. After the film 6 is clamped, the positioning gasket 2 is fixed with a top screw. After the top screw is tightened, it must be flush with the surface of the positioning gasket 2. Then, the fixing knob 10 is turned to adjust the position of the exposure point adjustment bolt 9 so that the radiation source is located at the exposure point 7. After the adjustment is completed, the positioning gasket 2 is fixed close to the side of the exposure point adjustment bolt 9. After the fixing is completed, the assembled device is inserted into the fillet weld of the tube plate to be inspected, and test photography is performed according to certain process conditions to determine the optimal process conditions, and then batch testing is performed. The work efficiency is high and the use is convenient.

[0034] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0036] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Se75 radiographic device for detecting fillet welds of tubes and tube sheets of heat exchangers, comprising an exposure guide tube (1) and a tube (8), characterized in that: The outside of the exposure tube (1) is symmetrically slidably connected with a positioning gasket (2); one end of the exposure tube (1) is provided with an adapter (4); the end of the exposure tube (1) away from the adapter (4) is provided with an exposure point adjustment bolt (9); the outside of the exposure tube (1) is provided with an exposure point (7); and a film (6) is sleeved on the outside of the exposure tube (1) and located on one side of the positioning gasket (2).

2. The Se75 radiography device for detecting fillet welds of tubes and tube sheets of heat exchangers according to claim 1, characterized in that: The outer side of the film (6) is provided with a central hole for use with the exposure guide tube (1).

3. The Se75 radiography device for detecting fillet welds of tubes and tube sheets of heat exchangers according to claim 1, characterized in that: One end of the adapter (4) is provided with an external thread (5).

4. The Se75 radiography device for detecting fillet welds of tubes and tube sheets of heat exchangers according to claim 1, characterized in that: The outer side of the tube (8) is fixedly connected to a tube sheet (3).

5. The Se75 radiography device for detecting fillet welds of tubes and tube sheets of heat exchangers according to claim 1, characterized in that: One end of the exposure point adjustment bolt (9) is fixedly connected to a fixed knob (10), and the outer side of the fixed knob (10) is fixedly connected to an anti-slip sleeve.

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