Low-alloy steel all-position inner wall surfacing device under preheating working condition and welding method

Abstract

The invention relates to the technical field of welding, and particularly discloses a low-alloy steel all-position inner wall surfacing device and a welding method under a preheating working condition, the low-alloy steel all-position inner wall surfacing device comprises an annular guide rail, a trolley platform, a feeding platform and a surfacing platform; a plurality of sets of ejector rods are arranged on the inner side of the annular guide rail, and the annular guide rail is fixed to the inner wall of the low alloy steel through the ejector rods in a mutually-abutting mode. The trolley platform is in driving fit with the annular guide rail; an adjusting cross rod is arranged between the surfacing platform and the trolley platform, one end of the adjusting cross rod is fixedly connected with the surfacing platform, and the other end of the adjusting cross rod is adjustably connected with the trolley platform; the surfacing platform is provided with a welding head, and the welding head faces the inner wall of the low-alloy steel; the feeding platform comprises a wire feeding pipe and a wire feeding disc. By adopting the design of the annular guide rail and the ejector rod, the stability and precision of the guide rail in the surfacing process are ensured, so that the overall precision of surfacing operation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a low alloy steel all-position inner wall surfacing device and a welding method under preheating conditions. Background Art

[0002] In the process of manufacturing and repairing low alloy steel, inner wall surfacing is a key process. However, due to the special shape and position of the inner wall of low alloy steel, traditional surfacing methods often fail to achieve ideal welding results. In addition, surfacing operations under preheating conditions place higher requirements on the stability and accuracy of the equipment. Therefore, a device and method specifically for surfacing the inner wall of low alloy steel under preheating conditions is needed. Summary of the invention

[0003] In order to overcome the problems existing in the prior art, the purpose of the present invention is to provide a low-alloy steel all-position inner wall surfacing device and welding method under preheating conditions.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a device for surfacing the inner wall of low-alloy steel in all positions under preheating conditions, comprising: an annular guide rail, a trolley platform, a feeding platform, and a surfacing platform; a plurality of groups of push rods are arranged on the inner side of the annular guide rail, and the annular guide rail is pressed and fixed to the inner wall of the low-alloy steel by the plurality of groups of push rods; the trolley platform is driven and cooperated with the annular guide rail; an adjusting cross bar is arranged between the surfacing platform and the trolley platform, one end of the adjusting cross bar is fixedly connected to the surfacing platform, and the other end of the adjusting cross bar is adjustably connected to the trolley platform; the surfacing platform is provided with a welding head, and the welding head faces the inner wall of the low-alloy steel; the feeding platform comprises a wire feeding tube and a wire feeding reel, the wire feeding reel is installed on the trolley platform for storing welding wire, the wire feeding tube is arranged on one side of the welding head, and the welding wire is drawn out from the wire feeding reel and passes through the welding head for surfacing operation.

[0005] Main working principle: The annular guide rail is designed to fit the shape of the inner wall of low alloy steel tightly, and is fixed to the inner wall by multiple sets of push rods. This design ensures the stability and accuracy of the guide rail during the surfacing process. The function of the push rod is to provide sufficient support for the annular guide rail to prevent it from being displaced or deformed due to external forces during the surfacing process. The trolley platform and the annular guide rail are matched through a driving mechanism (such as a motor, roller, etc.), so that the trolley platform can move smoothly along the annular guide rail. This design allows the surfacing operation to be performed at any position on the inner wall of low alloy steel, improving the flexibility and coverage of surfacing. One end of the adjustment crossbar is fixedly connected to the surfacing platform, and the other end is adjustably connected to the trolley platform. This design allows the user to adjust the distance and angle between the surfacing platform and the inner wall of low alloy steel according to actual needs. A welding head is provided on the surfacing platform, and the welding head faces the inner wall of low alloy steel for surfacing operations. By adjusting the adjustment crossbar, it can be ensured that the welding head maintains a stable posture and position during the surfacing process. The feeding platform includes a wire feeding tube and a wire feeding reel. The wire feeding reel is installed on the trolley platform and is used to store the welding wire. The wire feeding tube is set on one side of the welding head and is used to extract the welding wire from the wire feeding reel and transport it to the welding head. During the cladding process, the welding wire is continuously transported to the welding head through the wire feeding tube, and melted and deposited on the inner wall of the low alloy steel under the action of the welding head to form a cladding layer.

[0006] In summary, the working principle of the present invention can be summarized as follows: the device is fixed on the inner wall of low alloy steel by means of annular guide rails and a push rod; the driving mechanism in the trolley platform cooperates with the annular guide rails and moves along the annular guide rails at the same time, and the trolley platform drives the feeding platform and the surfacing platform to move along the annular guide rails during the movement, so that the surfacing platform can move outside the surfacing position; the position and angle of the surfacing platform are adjusted by adjusting the crossbar; a stable supply of welding wire is provided by the feeding platform; and finally, the surfacing operation of the inner wall of low alloy steel is completed under the action of the welding head. This design not only improves the accuracy and efficiency of surfacing, but also enhances the stability and applicability of the device.

[0007] Preferably, a rack is provided on the periphery of the annular guide rail, and the trolley platform is provided with a driven roller assembly and a driving roller assembly, the driven roller assembly and the driving roller assembly are arranged in parallel, and the driven roller assembly and the driving roller assembly are arranged on the side of the trolley platform facing the annular guide rail, and a gap is provided in the middle of the driving roller assembly and the driven roller assembly for the annular guide rail to pass through; a driving motor is provided at one end of the driving roller assembly, and a rolling gear is provided on the surface of the driving roller assembly, the annular guide rail passes through the gap between the driving roller assemblies, the rolling gear is meshed with the rack, the annular guide rail passes through the gap between the driven roller assemblies, and the driven roller assembly clamps the annular guide rail.

[0008] Preferably, a sliding opening is provided on one side of the trolley platform facing the surfacing platform, one end of the adjusting cross bar is inserted into the sliding opening, the adjusting cross bar moves along the sliding opening, a locking knob is provided on one side of the sliding opening, and the locking knob is tightened, so that the adjusting cross bar is fixedly connected to the sliding opening;

[0009] The surface of the adjusting cross bar is provided with scales, and the scales are arranged along the length direction of the adjusting cross bar.

[0010] Preferably, the surfacing platform comprises a bottom plate, a first slide rail, a first slide plate, a second slide rail and a second slide plate;

[0011] The end of the adjusting cross bar is fixedly connected to the base plate, and the base plate is provided with a first slide groove on a side facing the welding head, and the direction of the first slide groove is parallel to the direction of the welding head; the first slide rail is fitted and fixed to one side of the first slide plate, and the direction of the first slide rail is parallel to the direction of the welding head, and the first slide groove cooperates with the first slide rail; the second slide rail is fitted and fixed to the other side of the first slide plate, and the direction of the second slide rail is parallel to the direction of the first slide rail, and the second slide plate is provided with a second slide groove on a side facing the first slide plate, and the second slide groove cooperates with the first slide rail, and the second slide plate is connected to the welding head.

[0012] Preferably, the surfacing platform includes a connecting rod, the middle part of which is fixedly connected to the welding head, cameras are provided at both ends of the connecting rod, a rotating plate is provided on one side of the camera, the axis of the rotating plate is fixedly connected to the camera, an arc groove is provided on the periphery of the rotating plate, the arc groove is distributed with the axis of the rotating plate as the center, and the end of the connecting rod is connected to the arc groove by screws.

[0013] Preferably, the feeding platform is provided with a feeding roller, the feeding roller is arranged on one side of the wire feeding disk, and the feeding roller is driven by a motor.

[0014] Preferably, the feeding platform includes an adjusting rod, one end of which is connected to the surfacing platform, the adjusting rod is provided with an adjusting groove along the direction of the welding head, and the wire feeding tube is provided with an adjusting screw, which passes through the adjusting groove to fix the wire feeding tube on the adjusting rod.

[0015] A method for surfacing welding the inner wall of low alloy steel at all positions under preheating conditions, using any of the above-mentioned devices for surfacing welding the inner wall of low alloy steel at all positions under preheating conditions, and the steps are as follows:

[0016] S1, install the annular guide rail on the inner wall of the low alloy steel and tighten it;

[0017] S2, installing the trolley platform on the annular guide rail for trial welding, and observing whether the cladding platform interferes with the inner wall of the low alloy steel. If there is interference, adjustment is performed until the interference is eliminated;

[0018] S3, after the trial welding is completed, the trolley platform is removed, and the area of ​​the inner wall of the low-alloy steel to be welded is preheated, and the preheating temperature needs to be maintained at 150-250℃, and the heating time is not less than 2 hours to reach a uniform temperature;

[0019] S4, after the temperature is equalized, reinstall the trolley platform on the circular guide rail until the welding is completed.

[0020] Preferably, in S3, if the preheating process is interrupted, the inner wall of the low alloy steel needs to be reheated, the preheating temperature needs to be maintained at 250-400°C, and the heating time is not less than 4 hours to reach a uniform temperature.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention ensures the stability and accuracy of the guide rail during the surfacing process by adopting the design of an annular guide rail and a push rod, thereby improving the overall accuracy of the surfacing operation. The design of the annular guide rail and the push rod enables the device to fit tightly against the inner wall of the low-alloy steel and maintain a stable posture during the surfacing process, thereby enhancing the stability of the device; the driving coordination between the trolley platform and the annular guide rail, as well as the adjustable connection of the adjustment crossbar, enables the surfacing platform to flexibly adjust the position and angle according to actual needs, thereby further improving the accuracy and efficiency of surfacing. The feeding platform includes a wire feeding tube and a wire feeding reel, through which the welding wire is drawn out of the wire feeding reel and transported to the welding head, thereby achieving a stable supply of welding wire. This design ensures the continuity and stability of the welding wire during the surfacing process, and avoids surfacing defects caused by wire breakage or insufficient supply.

[0023] In summary, the low alloy steel all-position inner wall surfacing device under preheating conditions of the present invention has significant beneficial effects, including improving surfacing accuracy and efficiency, enhancing device stability and applicability, achieving stable supply of welding wire, simplifying operation procedures, and improving surfacing quality and reliability. These beneficial effects make the present invention have broad promotion value and application prospects in industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0025] Figure 1Schematic diagram of the all-position inner wall cladding device for low alloy steel under the preheating condition Figure 1 ;

[0026] Figure 2 Schematic diagram of the all-position inner wall cladding device for low alloy steel under the preheating condition Figure 2 ;

[0027] Figure 3 Schematic diagram of the surfacing platform Figure 1 ;

[0028] Figure 4 Schematic diagram of the surfacing platform Figure 2 ;

[0029] Figure 5 This is a diagram of the car platform Figure 1 ;

[0030] Figure 6 This is a diagram of the car platform Figure 2 ;

[0031] Figure 7 This is a schematic diagram of the circular guide rail.

[0032] 1. Annular guide rail; 10. Push rod; 11. Rack; 2. Trolley platform; 20. Active roller assembly; 200. Gear rolling; 21. Driven roller assembly; 22. Slide; 23. Locking knob; 3. Feeding platform; 30. Wire feeding disc; 31. Wire feeding tube; 32. Feeding roller; 33. Adjusting rod; 34. Adjusting slot; 35. Adjusting screw; 4. Overlay welding platform; 40. Welding head; 41. Bottom plate; 410. First slide slot; 42. First slide rail; 43. First slide plate; 44. Second slide rail; 45. Second slide plate; 450. Second slide slot; 46. Connecting rod; 47. Camera; 48. Turn plate; 480. Arc slot; 5. Adjusting cross bar; 50. Scale. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] Example 1

[0036] This embodiment discloses a low alloy steel all-position inner wall surfacing device under preheating conditions, such as Figure 1-Figure 7 As shown, it includes: an annular guide rail 1, a trolley platform 2, a feeding platform 3, and a surfacing platform 4; a plurality of groups of push rods 10 are arranged on the inner side of the annular guide rail 1, and the annular guide rail 1 is fixed to the inner wall of the low alloy steel by the plurality of push rods 10; the trolley platform 2 is driven and matched with the annular guide rail 1; an adjusting cross bar 5 is arranged between the surfacing platform 4 and the trolley platform 2, one end of the adjusting cross bar 5 is fixedly connected to the surfacing platform 4, and the other end of the adjusting cross bar 5 is adjustably connected to the trolley platform 2; the surfacing platform 4 is provided with a welding head 40, and the welding head 40 faces the inner wall of the low alloy steel; the feeding platform 3 includes a wire feeding tube 31 and a wire feeding reel 30, and the wire feeding reel 30 is installed on the trolley platform 2 for storing welding wire, and the wire feeding tube 31 is arranged on one side of the welding head 40, and the welding wire is drawn out from the wire feeding reel 30 and passes through the welding head 40 for surfacing operation. The annular guide rail 1 is tightly attached and fixed to the inner wall of the low alloy steel by the plurality of push rods 10, so as to ensure the stability of the device during the surfacing process.

[0037] The trolley platform 2 is driven and matched with the annular guide rail 1, and can move freely along the guide rail to facilitate the surfacing operation. The surfacing platform 4 is connected to the trolley platform 2 by adjusting the cross bar 5, and can flexibly adjust the position and angle of the welding head 40 to ensure the accuracy and efficiency of the surfacing. The feeding platform 3 includes a wire feeding tube 31 and a wire feeding disc 30 to achieve continuous and stable supply of welding wire and ensure the smooth progress of the surfacing operation. The structure is compact and easy to operate, and can significantly improve the efficiency and accuracy of the surfacing operation. The design of the annular guide rail 1 and the top rod 10 ensures the stability and safety of the device during the surfacing process. The setting of the feeding platform 3 realizes the automatic supply of welding wire, reduces manual intervention, and improves work efficiency.

[0038] In some optional embodiments, a rack 11 is provided on the periphery of the annular guide rail 1, and the trolley platform 2 is provided with a driven roller assembly 21 and a driving roller assembly 20. The driven roller assembly 21 and the driving roller assembly 20 are arranged in parallel, and the driven roller assembly 21 and the driving roller assembly 20 are arranged on the side of the trolley platform 2 facing the annular guide rail 1, and a gap is provided in the middle of the driving roller assembly 20 and the driven roller assembly 21 for the annular guide rail 1 to pass through; a driving motor is provided at one end of the driving roller assembly 20, and a rolling gear 200 is provided on the surface of the driving roller assembly 20, the annular guide rail 1 passes through the gap between the driving roller assemblies 20, the rolling gear 200 is meshed with the rack 11, the annular guide rail 1 passes through the gap between the driven roller assemblies 21, and the driven roller assembly 21 clamps the annular guide rail 1.

[0039] Specifically, Figure 7 As shown, a rack 11 is provided on the periphery of the annular guide rail 1, which meshes with the hobbing gear 200 of the active roller assembly 20 on the trolley platform 2, so as to achieve precise driving of the trolley platform 2 on the annular guide rail 1. The driven roller assembly 21 is arranged in parallel with the active roller assembly 20, and clamps the annular guide rail 1, further enhancing the stability of the trolley platform 2 during movement.

[0040] In some optional embodiments, a sliding opening 22 is provided on the side of the trolley platform 2 facing the surfacing platform 4, one end of the adjusting cross bar 5 is inserted into the sliding opening 22, and the adjusting cross bar 5 moves along the sliding opening 22, and can move along the sliding opening 22 to adjust the position of the surfacing platform 4. A locking knob 23 is provided on one side of the sliding opening 22, and the locking knob 23 is tightened, and the adjusting cross bar 5 is fixedly connected to the sliding opening 22. Through the design of the sliding opening 22 and the locking knob 23, the surfacing platform 4 is flexibly adjusted, which is convenient for adapting to the inner wall of low-alloy steel of different shapes and sizes. The setting of the scale 50 improves the accuracy and convenience of adjustment, and further improves the quality and efficiency of the surfacing operation.

[0041] In some optional embodiments, such as Figure 3 and Figure 4 As shown, the surfacing platform 4 includes a bottom plate 41, a first slide rail 42, a first slide plate 43, a second slide rail 44 and a second slide plate 45;

[0042] The end of the adjusting cross bar 5 is fixedly connected to the base plate 41, and a first slide groove 410 is provided on the side of the base plate 41 facing the welding head 40, and the direction of the first slide groove 410 is parallel to the direction of the welding head 40; the first slide rail 42 is fitted and fixed to one side of the first slide plate 43, and the direction of the first slide rail 42 is parallel to the direction of the welding head 40, and the first slide groove 410 cooperates with the first slide rail 42; the second slide rail 44 is fitted and fixed to the other side of the first slide plate 43, and the direction of the second slide rail 44 is parallel to the direction of the first slide rail 42, and a second slide groove 450 is provided on the side of the second slide plate 45 facing the first slide plate 43, and the second slide groove 450 cooperates with the first slide rail 42, and the second slide plate 45 is connected to the welding head 40.

[0043] The end of the adjustment cross bar 5 is fixedly connected to the bottom plate 41, and the bottom plate 41 is provided with a first slide groove 410 on the side facing the welding head 40, which cooperates with the first slide rail 42. The first slide rail 42 is fixedly fitted with one side of the first slide plate 43, and the second slide rail 44 is fixedly fitted with the other side of the first slide plate 43. The second slide plate 45 is provided with a second slide groove 450 on the side facing the first slide plate 43, which cooperates with the first slide rail 42. The second slide plate 45 is connected to the welding head 40 to achieve position adjustment of the welding head 40.

[0044] In some optional embodiments, the surfacing platform 4 includes a connecting rod 46, the middle part of the connecting rod 46 is fixedly connected to the welding head 40, cameras 47 are provided at both ends of the connecting rod 46, a rotating plate 48 is provided on one side of the camera 47, the axis of the rotating plate 48 is fixedly connected to the camera 47, an arc groove 480 is provided on the periphery of the rotating plate 48, and the arc groove 480 is distributed with the axis of the rotating plate 48 as the center of the circle, and the end of the connecting rod 46 is connected to the arc groove 480 by a screw to realize the angle adjustment of the camera 47, so as to facilitate the monitoring of the welding head 40.

[0045] In some optional embodiments, the feeding platform 3 is provided with a feeding roller. The feeding roller 32 is arranged on one side of the wire feeding disk 30, and the feeding roller 32 is driven by a motor to realize continuous supply of welding wire.

[0046] In some optional embodiments, the feeding platform 3 includes an adjusting rod 33, one end of which is connected to the surfacing platform 4, and the adjusting rod 33 is provided with an adjusting slot 34 along the direction of the welding head 40. The wire feeding tube 31 is provided with an adjusting screw 35, and the adjusting screw 35 passes through the adjusting slot 34 to fix the wire feeding tube 31 on the adjusting rod 33. By adjusting the position of the adjusting screw 35 in the adjusting slot 34, the position of the adjusting rod 33 can be adjusted.

[0047] First, the device is fixed to the inner wall of the low alloy steel by the annular guide rail 1 and multiple groups of push rods 10, ensuring stability during the surfacing process. A rack 11 is provided on the periphery of the annular guide rail 1, which meshes with the rolling gear 200 of the active roller assembly 20 on the trolley platform 2, and the active roller assembly 20 is driven by the driving motor to rotate, thereby realizing the movement of the trolley platform 2 along the annular guide rail 1. The trolley platform 2 and the surfacing platform 4 are connected by an adjusting cross bar 5, one end of the adjusting cross bar 5 is fixed to the surfacing platform 4, and the other end is inserted into the sliding mouth 22 of the trolley platform 2 and can move along the sliding mouth 22. By adjusting the position of the adjusting cross bar 5 in the sliding mouth 22 and fixing it with the locking knob 23, the rough adjustment of the position of the surfacing platform 4 can be achieved. A scale 50 is provided on the surface of the adjusting cross bar 5 to facilitate precise control of the adjustment amount.

[0048] The surfacing platform 4 includes a bottom plate 41, a first slide rail 42, a first slide plate 43, a second slide rail 44 and a second slide plate 45. Through the design of a multi-stage sliding mechanism, the position of the welding head 40 can be finely adjusted. Specifically, the first slide rail 42 cooperates with the first slide plate 43, and the second slide rail 44 cooperates with the second slide plate 45. By adjusting the positions of the first slide plate 43 and the second slide plate 45, the position and angle of the welding head 40 can be accurately controlled.

[0049] The welding head 40 of the surfacing platform 4 faces the inner wall of the low alloy steel and is used for surfacing operation. At the same time, the surfacing platform 4 also includes a connecting rod 46 and a camera 47. The middle part of the connecting rod 46 is fixedly connected to the welding head 40, and cameras 47 are provided at both ends for monitoring the surfacing process. A rotating plate 48 is provided on one side of the camera 47, and an arc groove 480 is provided on the periphery of the rotating plate 48. By adjusting the position of the screw in the arc groove 480, the angle of the camera 47 can be adjusted to facilitate obtaining the best monitoring angle.

[0050] The feeding platform 3 includes a wire feeding tube 31 and a wire feeding reel 30. The wire feeding reel 30 is installed on the trolley platform 2 and is used to store welding wire. The wire feeding tube 31 is arranged on one side of the welding head 40. The welding wire is drawn out from the wire feeding reel 30 and passes through the welding head 40 for cladding. The feeding platform 3 is also provided with a feeding roller 32 and an adjusting rod 33. The feeding roller 32 is driven by a motor and is used to continuously draw the welding wire from the wire feeding reel 30. One end of the adjusting rod 33 is connected to the cladding platform 4, and the other end is provided with an adjusting slot 34. The wire feeding tube 31 is provided with an adjusting screw 35. By adjusting the position of the adjusting screw 35 in the adjusting slot 34, the angle and position of the wire feeding tube 31 can be finely adjusted to ensure that the welding wire is accurately delivered to the welding head 40.

[0051] In summary, the low alloy steel all-position inner wall surfacing device under preheating conditions realizes accurate surfacing of the inner wall of low alloy steel through the cooperation of the annular guide rail 1, the trolley platform 2, the feeding platform 3 and the surfacing platform 4. By adjusting the crossbar 5, the multi-stage sliding mechanism of the surfacing platform 4 and the adjusting rod 33 of the feeding platform 3 and other components, the position and angle of the welding head 40, as well as the feeding speed and direction of the welding wire can be accurately controlled, thereby meeting various complex surfacing requirements.

[0052] Example 2

[0053] A method for surfacing welding the inner wall of low alloy steel at all positions under preheating conditions, using any of the above-mentioned low alloy steel surfacing welding devices at all positions under preheating conditions, and the steps are as follows:

[0054] S1, installing the annular guide rail 1 on the inner wall of the low alloy steel and tightening and fixing it;

[0055] S2, install the trolley platform 2 on the annular guide rail 1 to conduct test welding, and observe whether the cladding platform 4 interferes with the inner wall of the low alloy steel. If there is interference, adjust it until the interference is eliminated;

[0056] S3, after the trial welding is completed, the trolley platform 2 is removed, and the area of ​​the inner wall of the low-alloy steel to be welded is preheated, and the preheating temperature needs to be maintained at 150-250°C, and the heating time is not less than 2 hours to reach a uniform temperature;

[0057] S4, after the temperature is equalized, the trolley platform 2 is reinstalled on the annular guide rail 1 until the welding is completed.

[0058] In some optional embodiments, in S3, if the preheating process is interrupted, the inner wall of the low alloy steel needs to be reheated, the preheating temperature needs to be maintained at 250-400°C, and the heating time is not less than 4 hours to reach a uniform temperature.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A low alloy steel all-position inner wall surfacing device under preheating conditions, characterized in that: include: Annular guide rail, trolley platform, feeding platform, surfacing platform; A plurality of push rods are arranged on the inner side of the annular guide rail, and the annular guide rail is fixed to the inner wall of the low alloy steel by the plurality of push rods; the trolley platform is drivingly matched with the annular guide rail; An adjusting cross bar is provided between the surfacing platform and the trolley platform, one end of the adjusting cross bar is fixedly connected to the surfacing platform, and the other end of the adjusting cross bar is adjustably connected to the trolley platform; the surfacing platform is provided with a welding head, and the welding head faces the inner wall of the low alloy steel; The feeding platform includes a wire feeding tube and a wire feeding reel. The wire feeding reel is installed on the trolley platform for storing welding wire. The wire feeding tube is arranged on one side of the welding head. The welding wire is drawn out from the wire feeding reel and passes through the welding head for surfacing operation.

2. The all-position inner wall surfacing device for low alloy steel under preheating conditions according to claim 1 is characterized in that: A rack is provided on the periphery of the annular guide rail, and the trolley platform is provided with a driven roller assembly and a driving roller assembly. The driven roller assembly and the driving roller assembly are arranged in parallel, and the driven roller assembly and the driving roller assembly are arranged on the side of the trolley platform facing the annular guide rail, and a gap is provided between the driving roller assembly and the driven roller assembly for the annular guide rail to pass through; a driving motor is provided at one end of the driving roller assembly, and a rolling gear is provided on the surface of the driving roller assembly, the annular guide rail passes through the gap between the driving roller assemblies, the rolling gear is meshed with the rack, the annular guide rail passes through the gap between the driven roller assemblies, and the driven roller assembly clamps the annular guide rail.

3. The all-position inner wall surfacing device for low alloy steel under preheating conditions according to claim 1 is characterized in that: A sliding opening is provided on one side of the trolley platform facing the surfacing platform, one end of the adjusting cross bar is inserted into the sliding opening, the adjusting cross bar moves along the sliding opening, a locking knob is provided on one side of the sliding opening, and the locking knob is tightened, so that the adjusting cross bar is fixedly connected to the sliding opening; The surface of the adjusting cross bar is provided with scales, and the scales are arranged along the length direction of the adjusting cross bar.

4. The all-position inner wall surfacing device for low alloy steel under preheating conditions according to claim 1 is characterized in that: The surfacing platform comprises a bottom plate, a first slide rail, a first slide plate, a second slide rail and a second slide plate; The end of the adjusting cross bar is fixedly connected to the base plate, and the base plate is provided with a first slide groove on a side facing the welding head, and the direction of the first slide groove is parallel to the direction of the welding head; the first slide rail is fitted and fixed to one side of the first slide plate, and the direction of the first slide rail is parallel to the direction of the welding head, and the first slide groove cooperates with the first slide rail; the second slide rail is fitted and fixed to the other side of the first slide plate, and the direction of the second slide rail is parallel to the direction of the first slide rail, and the second slide plate is provided with a second slide groove on a side facing the first slide plate, and the second slide groove cooperates with the first slide rail, and the second slide plate is connected to the welding head.

5. The all-position inner wall surfacing device for low alloy steel under preheating conditions according to claim 1 is characterized in that: The surfacing platform includes a connecting rod, the middle part of which is fixedly connected to the welding head, cameras are provided at both ends of the connecting rod, a rotating plate is provided on one side of the camera, the axis of the rotating plate is fixedly connected to the camera, an arc groove is provided on the periphery of the rotating plate, the arc groove is distributed with the axis of the rotating plate as the center, and the end of the connecting rod is connected to the arc groove by a screw.

6. The all-position inner wall surfacing device for low alloy steel under preheating conditions according to claim 1 is characterized in that: The feeding platform is provided with a feeding roller, the feeding roller is arranged on one side of the wire feeding disc, and the feeding roller is driven by a motor.

7. The all-position inner wall surfacing device for low alloy steel under preheating conditions according to claim 1 is characterized in that: The feeding platform includes an adjusting rod, one end of which is connected to the surfacing platform, the adjusting rod is provided with an adjusting groove along the direction of the welding head, and the wire feeding tube is provided with an adjusting screw, which passes through the adjusting groove to fix the wire feeding tube on the adjusting rod.

8. A method for surfacing welding the inner wall of low alloy steel at all positions under preheating conditions, using the surfacing welding device for the inner wall of low alloy steel at all positions under preheating conditions as claimed in any one of claims 1 to 7, characterized in that: Here are the steps: S1, install the annular guide rail on the inner wall of the low alloy steel and tighten it; S2, installing the trolley platform on the annular guide rail for trial welding, and observing whether the cladding platform interferes with the inner wall of the low alloy steel. If there is interference, adjustment is performed until the interference is eliminated; S3, after the trial welding is completed, the trolley platform is removed, and the area of ​​the inner wall of the low-alloy steel to be welded is preheated, and the preheating temperature needs to be maintained at 150-250℃, and the heating time is not less than 2 hours to reach a uniform temperature; S4, after the temperature is equalized, reinstall the trolley platform on the circular guide rail until the welding is completed.

9. The method for all-position inner wall surfacing of low alloy steel under preheating conditions according to claim 8, characterized in that: In S3, if the preheating process is interrupted, the inner wall of the low alloy steel needs to be reheated, the preheating temperature needs to be maintained at 250-400°C, and the heating time is not less than 4 hours to reach a uniform temperature.

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