Stepped tube laser cladding inner wall protection device capable of uniformly dispersing gas

Abstract

The utility model relates to the technical field of pipe part laser cladding protection, in particular to a stepped pipe laser cladding inner wall protection device for uniformly dispersing gas, which comprises a switching sealing table, the quick connector is in threaded connection with the front end face of the switching sealing table; one end of each gas dispersion pipe is in threaded connection with the rear end face of the switching sealing table, the other end of each gas dispersion pipe is closed, the gas dispersion pipes are different in length and are distributed in a step shape, and gas dispersion small holes are evenly distributed in the bottom surfaces, close to the closed ends, of the gas dispersion pipes. The protective device is relatively simple to manufacture, low in use cost, good in protective effect and wide in application prospect, protective gas is uniformly dispersed to each area of a protected pipe fitting through the gas dispersion pipes which are different in length, are distributed in a stepped manner and are provided with the small gas dispersion holes at the end parts, the inner wall of the pipe fitting can be protected in the laser cladding process of the pipe fitting, and the service life of the pipe fitting is prolonged. And the inner wall of the pipe fitting is prevented from being oxidized due to high temperature in the laser cladding process.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cladding protection for pipe parts, in particular to an inner wall protection device for pipe laser cladding with stepped and uniformly dispersed gas. Background Technique

[0002] To endow the outer surface of high-value-added pipe fittings with special properties (wear resistance, corrosion resistance, oxidation resistance, etc.) or repair the damaged outer surface of pipe fittings, the commonly used method is laser cladding. Laser cladding is a surface treatment technology and can also be used for additive repair. This technology irradiates a laser beam with a high energy density on the surface of the material to be processed, so that the powder and the substrate are melted and solidified rapidly at the same time, and a cladding layer is formed on the surface of the part to be processed. This technology has the advantages of low dilution rate, high density, good bonding between the coating and the substrate, wide range of suitable cladding materials, high efficiency, etc., and is suitable for the processing and repair of pipe parts. In the laser cladding of pipe parts, the coaxial powder feeding method is usually used for powder transportation. In this method, argon gas is often used as the powder feeding gas during the cladding process. The powder feeding gas not only transports the powder but also plays a role in protecting the molten pool, protecting the cladding layer and the outer surface of the pipe fitting during the cladding process, and preventing its high-temperature oxidation. However, due to the effect of heat conduction during the laser cladding process, the temperature of the inner surface of the pipe fitting is relatively high, and oxidation is likely to occur under insufficient protection. Although the pipe fitting cladding equipment can be placed entirely in a gas protection device, this method is costly and has a very high usage cost. Content of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides an inner wall protection device for pipe laser cladding with stepped and uniformly dispersed gas.

[0004] The technical problems to be solved by the utility model are realized by the following technical solutions:

[0005] An inner wall protection device for pipe laser cladding with stepped and uniformly dispersed gas, comprising:

[0006] An adapter sealing table, connected to a fixed support table at the front side and inserted into the pipe fitting to be clad at the rear side;

[0007] A quick connector, threadedly connected to the front end face of the adapter sealing table for connecting a protection gas device;

[0008] A plurality of gas dispersion pipes, one end of each of the plurality of gas dispersion pipes is threadedly connected to the rear end face of the adapter sealing table and the other end is sealed. The lengths of the plurality of gas dispersion pipes are inconsistent and are distributed in a stepped manner. Gas dispersion holes are distributed on the bottom surface of each of the plurality of gas dispersion pipes near the sealed end.

[0009] As a further improvement of the technical solution of the utility model, the adapter sealing table includes a plugging section, a sealing section and a fixing section. The plugging section is plugged and matched with the pipe fitting to be clad. The fixing section is connected to the fixing support table, and fixing holes are provided on the fixing section.

[0010] As a further improvement of the technical solution of the utility model, the length dimension of the plugging section does not exceed one tenth of the length dimension of the pipe fitting to be clad, and the diameter dimension of the plugging section is 0.5 mm smaller than the inner diameter dimension of the pipe fitting to be clad.

[0011] As a further improvement of the technical solution of the utility model, the diameter dimension of the sealing section is 2 mm larger than the outer diameter dimension of the pipe fitting to be clad.

[0012] As a further improvement of the technical solution of the utility model, the diameter dimension of the gas dispersion holes on multiple gas dispersion pipes is 1 mm, and the center distance between two adjacent gas dispersion holes is 1.5 mm.

[0013] As a further improvement of the technical solution of the utility model, multiple gas dispersion pipes correspondingly include a first gas dispersion pipe, a second gas dispersion pipe, a third gas dispersion pipe, a fourth gas dispersion pipe and a fifth gas dispersion pipe which are threadedly connected to the plugging section.

[0014] As a further improvement of the technical solution of the utility model, the total length dimension of the first gas dispersion pipe and the plugging section is one fifth of the length dimension of the pipe fitting to be clad;

[0015] The total length dimension of the second gas dispersion pipe and the plugging section is two fifths of the length dimension of the pipe fitting to be clad;

[0016] The total length dimension of the third gas dispersion pipe and the plugging section is three fifths of the length dimension of the pipe fitting to be clad;

[0017] The total length dimension of the fourth gas dispersion pipe and the plugging section is four fifths of the length dimension of the pipe fitting to be clad;

[0018] The total length dimension of the fifth gas dispersion pipe and the plugging section is the same as the length dimension of the pipe fitting to be clad.

[0019] As a further improvement of the technical solution of the utility model, the distribution length of the gas dispersion holes on the first gas dispersion pipe is the same as the length of the first gas dispersion pipe, and the distribution length of the gas dispersion holes on the second gas dispersion pipe, the third gas dispersion pipe, the fourth gas dispersion pipe and the fifth gas dispersion pipe is one fifth of the length dimension of the pipe fitting to be clad.

[0020] As a further improvement of the technical solution of the utility model, the adapter sealing table is made of aluminum alloy, and multiple gas dispersion pipes are all made of stainless steel.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The present utility model provides a pipe - type laser cladding inner wall protection device for stepped and uniform gas dispersion, which has the characteristics of relatively simple production, low use cost, good protection effect, and wide application prospects. Through gas dispersion pipes with different lengths distributed in a stepped manner and having gas dispersion holes at the ends, the protective gas is evenly dispersed to each area of the pipe to be protected, and can play a protective role in the inner wall of the pipe during the laser cladding process of the pipe, preventing the inner wall of the pipe from being oxidized due to high temperature during the laser cladding process. Description of the Drawings

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0024] Figure 1 Schematic three - dimensional structure of the present utility model Figure 1 ;

[0025] Figure 2 Schematic three - dimensional structure of the present utility model Figure 2 ;

[0026] Figure 3 Schematic three - dimensional view of the adapter sealing platform of the present utility model;

[0027] Figure 4 Schematic front - view structure of the adapter sealing platform of the present utility model;

[0028] Figure 5 Schematic left - view structure of the adapter sealing platform of the present utility model;

[0029] Figure 6 Schematic top - view structure of the adapter sealing platform of the present utility model;

[0030] Figure 7 Schematic partial device structure diagram used in the process of laser cladding of the pipe;

[0031] Figure 8 Schematic diagram of the combined effect of partial devices used in the process of laser cladding of the pipe.

[0032] In the figure: 1. Pipe - type laser cladding inner wall protection device; 11. Quick - connect fitting; 12. Adapter sealing platform; 121. Insertion section; 122. Sealing section; 123. Fixing section; 124. Fixing hole; 13. First gas dispersion pipe; 14. Second gas dispersion pipe; 15. Third gas dispersion pipe; 16. Fourth gas dispersion pipe; 17. Fifth gas dispersion pipe; 2. Laser powder beam; 3. Pipe to be clad; 4. Rotating motor with three - jaw chuck; 5. Fixed support platform. Detailed Embodiments

[0033] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with the attached drawings and embodiments.

[0034] As shown in Figures 1 to 6 the figure, a stepped uniform gas dispersion tube-type laser cladding inner wall protection device mainly consists of a quick connector 11, a transition sealing table 12, a first gas dispersion tube 13, a second gas dispersion tube 14, a third gas dispersion tube 15, a fourth gas dispersion tube 16, and a fifth gas dispersion tube 17. The quick connector 11 is a standard part, the transition sealing table 12 is made of aluminum alloy, and the first gas dispersion tube 13, the second gas dispersion tube 14, the third gas dispersion tube 15, the fourth gas dispersion tube 16, and the fifth gas dispersion tube 17 are made of stainless steel.

[0035] One end of the quick connector 11 is threadedly connected to the front side of the transition sealing table 12 for connecting a protective gas device.

[0036] The transition sealing table 12 consists of a plugging section 121, a sealing section 122, and a fixing section 123. The plugging section 121 is completely plugged into the pipe fitting 3 to be cladded during use; three fixing holes 124 are provided on the side of the fixing section 123. During use, the fixing section 123 is bolted to the fixing support table 5 through the three fixing holes 124 to fix the entire pipe fitting laser cladding inner wall protection device, and the pipe fitting laser cladding inner wall protection device does not rotate with the pipe fitting 3 to be cladded during the cladding process.

[0037] As a further improvement of this embodiment, the length dimension of the plugging section 121 does not exceed one-tenth of the length dimension of the pipe fitting 3 to be cladded, and the diameter dimension of the plugging section 121 is 0.5 mm smaller than the inner diameter dimension of the pipe fitting 3 to be cladded; the diameter dimension of the sealing section 122 is 2 mm larger than the outer diameter dimension of the pipe fitting 3 to be cladded.

[0038] One ends of the first gas dispersion tube 13, the second gas dispersion tube 14, the third gas dispersion tube 15, the fourth gas dispersion tube 16, and the fifth gas dispersion tube 17 are all threadedly connected to the plugging section 121, and the other ends are all sealed; the lengths of the first gas dispersion tube 13, the second gas dispersion tube 14, the third gas dispersion tube 15, the fourth gas dispersion tube 16, and the fifth gas dispersion tube 17 are inconsistent and are distributed in a stepped manner, and gas dispersion small holes are distributed on the surface near the sealed end.

[0039] As a further improvement of this embodiment, the total length dimension of the first gas dispersion tube 13 and the insertion section 121 is one-fifth of the length dimension of the fitting to be clad 3; the total length dimension of the second gas dispersion tube 14 and the insertion section 121 is two-fifths of the length dimension of the fitting to be clad 3; the total length dimension of the third gas dispersion tube 15 and the insertion section 121 is three-fifths of the length dimension of the fitting to be clad 3; the total length dimension of the fourth gas dispersion tube 16 and the insertion section 121 is four-fifths of the length dimension of the fitting to be clad 3; the total length dimension of the fifth gas dispersion tube 17 and the insertion section 121 is the same as the length dimension of the fitting to be clad 3.

[0040] As a further improvement of this embodiment, the diameter dimension of the gas dispersion small holes on the first gas dispersion tube 13, the second gas dispersion tube 14, the third gas dispersion tube 15, the fourth gas dispersion tube 16, and the fifth gas dispersion tube 17 is 1 mm, and the center distance between two adjacent gas dispersion small holes is 1.5 mm.

[0041] As a further improvement of this embodiment, the distribution length of the gas dispersion small holes on the first gas dispersion tube 13 is the same as the length of the first gas dispersion tube 13.

[0042] The distribution length of the gas dispersion small holes on the second gas dispersion tube 14, the third gas dispersion tube 15, the fourth gas dispersion tube 16, and the fifth gas dispersion tube 17 is one-fifth of the length dimension of the fitting to be clad 3.

[0043] The working principle and usage process of the utility model:

[0044] During use, as Figure 7 and Figure 8As shown, the pipe fitting 3 to be clad is fixedly clamped on the rotating motor 4 with a three-jaw chuck. Subsequently, the insertion section 121 on the inner wall protection device 1 for laser cladding of pipe fittings is inserted into the pipe fitting 3 to be clad. The inner wall protection device 1 for laser cladding of pipe fittings is connected to the fixed support platform 5 through the fixing holes 124 on the fixing section 123 by bolts. During the entire cladding process, the fixed support platform 5 supports and fixes the inner wall protection device 1 for laser cladding of pipe fittings, so that it does not rub against the pipe fitting 3 to be clad while delivering the protective gas to the inner wall of the pipe fitting to be protected. Subsequently, the rotating motor 4 with a three-jaw chuck drives the pipe fitting 3 to be clad to rotate through the three-jaw chuck, and the laser powder beam 2 irradiates the pipe fitting 3 to be clad for cladding. The protective gas enters the adapter sealing platform 12, the first gas dispersion pipe 13, the second gas dispersion pipe 14, the third gas dispersion pipe 15, the fourth gas dispersion pipe 16, and the fifth gas dispersion pipe 17 through the quick-connect joint 11 in the inner wall protection device 1 for laser cladding of pipe fittings. The gas dispersion holes on the first gas dispersion pipe 13, the second gas dispersion pipe 14, the third gas dispersion pipe 15, the fourth gas dispersion pipe 16, and the fifth gas dispersion pipe 17 are used to complete the delivery and dispersion of the protective gas, so that the protective gas is evenly distributed in the pipe fitting 3 to be clad, and plays a protective role in the inner wall of the pipe fitting 3 during the laser cladding of the pipe fitting 3 to be clad.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A tube laser cladding inner wall protection device with stepped uniform gas dispersion, characterized in that: include: A transfer sealing platform (12), the front side of which is connected to the fixed support platform (5), and the rear side of which is inserted into the pipe to be clad (3); A quick-insert connector (11) is threadedly connected to the front end surface of the transfer sealing platform (12) and is used for connecting a protective gas device; A plurality of gas dispersion tubes are provided, one end of each of the gas dispersion tubes is threadedly connected to the rear end surface of the transfer sealing platform (12) and the other end is sealed, the lengths of the plurality of gas dispersion tubes are inconsistent and are distributed in a stepped manner, and gas dispersion small holes are distributed on the bottom surfaces of the plurality of gas dispersion tubes near the sealed ends.

2. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 1 is characterized by: The transition sealing platform (12) comprises an insertion section (121), a sealing section (122) and a fixing section (123); the insertion section (121) is inserted and matched with the pipe (3) to be clad; the fixing section (123) is connected to the fixed support platform (5); and a fixing hole (124) is provided on the fixing section (123).

3. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 2 is characterized by: The length of the inserted section (121) does not exceed one tenth of the length of the pipe (3) to be clad, and the diameter of the inserted section (121) is 0.5 mm smaller than the inner diameter of the pipe (3) to be clad.

4. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 2 is characterized by: The diameter of the sealing section (122) is 2 mm larger than the outer diameter of the pipe (3) to be clad.

5. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 1 is characterized by: The diameter of the gas dispersion holes on the multiple gas dispersion tubes is 1 mm, and the distance between the centers of two adjacent gas dispersion holes is 1.5 mm.

6. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 2 is characterized by: The plurality of gas dispersion tubes correspond to a first gas dispersion tube (13), a second gas dispersion tube (14), a third gas dispersion tube (15), a fourth gas dispersion tube (16), and a fifth gas dispersion tube (17) which are threadedly connected to the plug-in section (121).

7. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 6 is characterized by: The total length of the first gas dispersion pipe (13) and the plugging section (121) is one fifth of the length of the pipe (3) to be clad; The total length of the second gas dispersion pipe (14) and the plugging section (121) is two fifths of the length of the pipe (3) to be clad; The total length of the third gas dispersion pipe (15) and the plugging section (121) is three fifths of the length of the pipe (3) to be clad; The total length of the fourth gas dispersion pipe (16) and the plugging section (121) is four fifths of the length of the pipe (3) to be clad; The total length of the fifth gas dispersion pipe (17) and the plugging section (121) is consistent with the length of the pipe (3) to be clad.

8. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 6 is characterized by: The distribution length of the gas dispersion holes on the first gas dispersion tube (13) is consistent with the length of the first gas dispersion tube (13), and the distribution length of the gas dispersion holes on the second gas dispersion tube (14), the third gas dispersion tube (15), the fourth gas dispersion tube (16), and the fifth gas dispersion tube (17) is one fifth of the length of the pipe (3) to be clad.

9. The tube laser cladding inner wall protection device with stepped uniform gas dispersion according to claim 1 is characterized by: The transfer sealing platform (12) is made of aluminum alloy, and the plurality of gas dispersion pipes are all made of stainless steel.

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